Task - Methods - Menu-driven Calculator

[akash-coded]

WAP to create a basic calculator application with these functionalities:

• Addition
• Subtraction
• Multiplication
• Division

Bonus: Menu-driven program

[mkaifahmed]

`import java.util.*;

public class Calculator {

public static void main(String[] args) {
    System.out.println("Calculator:");
    double num1;
    double num2;
    Scanner sc = new Scanner(System.in);
    int choice;
    do {
        System.out.println("Enter the numbers : ");
        num1 = sc.nextDouble();
        num2 = sc.nextDouble();
        System.out.println("Choose the operation you want to perform 1.Add 2.Sub 3.Multiply 4.Divide 5.Modulus ");
        int op = sc.nextInt();

        double result = 0;

        switch (op) {
            case 1:
                result = num1 + num2;
                System.out.println(result);
                break;
            case 2:
                result = num1 - num2;
                System.out.println(result);
                break;

            case 3:
                result = num1 * num2;
                System.out.println(result);
                break;
            case 4:
                if (num2 != 0) {
                    result = num1 / num2;
                    System.out.println(result);
                    break;
                } else {
                    System.out.println("Divide by zero not possible");
                    break;
                }
            case 5:
                if (num2 != 0) {
                    result = num1 % num2;
                    System.out.println(result);
                    break;
                } else {
                    System.out.println("Divide by zero not possible");
                    break;
                }

            default:

                System.out.println("Please select the appropriate operation");

                break;

        }
        System.out.println("press 1 to continue 0 to exit");
        choice = sc.nextInt();
    } while (choice == 1);
    sc.close();

}

}

`

[Sarfinaa]

import java.util.Scanner;

public class SimpleCalculator {
    public static void performOperation(int choice, int a, int b) {
        switch (choice) {
            case 1:
                System.out.println("Addition of " + a + " and " + b + ": " + a + b);
                break;
            case 2:
                System.out.println("Subtraction of " + a + " and " + b + ": " + (a - b));
                break;
            case 3:
                System.out.println("Multiplication of " + a + " and " + b + ": " + a * b);
                break;
            case 4:
                if (b == 0) {
                    System.out.println("You can't divide " + a + " by 0");
                    break;
                }
                System.out.println("Division of " + a + " and " + b + ": " + a / b);
                break;
            case 5:
                if (b == 0) {
                    System.out.println("You can't modulus " + a + " by 0");
                    break;
                }
                System.out.println("Modulus of " + a + " and " + b + ": " + a % b);
                break;
            default:
                System.out.println("Ivalid Argument");
        }

    }

    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);
        System.out.println("            Simple Calculator");
        System.out.println("1. Addition");
        System.out.println("2. Subtraction");
        System.out.println("3. Multiplication");
        System.out.println("4. Division");
        System.out.println("5. Modulus");
        System.out.println("Enter Your Choice According To The Operation You Want To Perform(Ex->1,2,3,4 or 5):");
        int choice = s.nextInt();
        System.out.println("Enter the two numbers:");
        int a = s.nextInt();
        int b = s.nextInt();
        performOperation(choice, a, b);
        s.close();

    }

}

[shreiyarandive]

`
import java.util.Scanner;

public class Calcluator {

public static void main(String[] args) {
    Scanner s = new Scanner(System.in);
    System.out.println("--------------------Calcluator--------------------");

    int choice, num1, num2, result = 0;
    char ch;
    do {
        System.out.println("What do you want to do");
        System.out.println("1. Add \n2. Subtract \n3. Multiply \n4. Divide \n5. Modulus");
        choice = s.nextInt();
        System.out.println("Enter num1 ");
        num1 = s.nextInt();
        System.out.println("Enter num2 ");
        num2 = s.nextInt();

        switch (choice) {
            case 1:
                result = add(num1, num2);
                System.out.println("Sum is " + result);
                break;
            case 2:
                result = subtract(num1, num2);
                System.out.println("Difference is " + result);
                break;
            case 3:
                result = multiply(num1, num2);
                System.out.println("Multiplication is " + result);
                break;
            case 4:
                if (num2 != 0) {
                    double res = divide(num1, num2);
                    System.out.println("Division is " + res);
                } else
                    System.err.println("Divide by zero error");
                break;
            case 5:
                result = modulus(num1, num2);
                System.out.println("Remainder is " + result);
                break;
            default:
                System.err.println("Wrong Choice");

        }
        System.out.println("Press Y to continue...");
        ch = s.next().charAt(0);
    } while (ch == 'Y' || ch == 'y');

    s.close();
}

public static int add(int num1, int num2) {
    return num1 + num2;
}

public static int subtract(int num1, int num2) {
    return num1 - num2;
}

public static int multiply(int num1, int num2) {
    return num1 * num2;
}

public static double divide(int num1, int num2) {
    return num1 / (double) num2;
}

public static int modulus(int num1, int num2) {
    return num1 % num2;
}

}
`

[SaichaitanyareddyG]

`import java.util.Scanner;

class calculator {
static int n2;

public static void read(Scanner s) {
    n2 = s.nextInt();
}

public static void main(String[] args) {
    char ch;

    do {
        Scanner s = new Scanner(System.in);
        int n1 = s.nextInt();
        ch = s.next().charAt(0);

        switch (ch) {
            case '+':
                read(s);
                System.out.println(n1 + n2);
                break;
            case '-':
                read(s);
                System.out.println(n1 - n2);
                break;
            case '*':
                read(s);
                System.out.println(n1 * n2);
                break;
            case '/':
                read(s);
                System.out.println(n1 / n2);
                break;
            case '%':
                read(s);
                System.out.println(n1 % n2);
                break;
            default:
                System.out.println("Enter valid input");
        }
    } while (ch != 'e');

}

}
`

[rakeshGit419]

`import java.util.*;
public class Main
{
public static void main(String[] args) {

	Scanner scn = new Scanner(System.in);
	
        System.out.println("Enter an expression below {a+b} ");
        String exp = scn.next(); // expression like {2+3}
        scn.close();
        
        int a = Character.getNumericValue(exp.charAt(0));
        int b = Character.getNumericValue(exp.charAt(2));
        char operator = exp.charAt(1);


        switch (operator) {
            case '+':
              System.out.println(a+b);
              break;
            case '-':
              System.out.println(a-b);
              break;
            case '*':
              System.out.println(a*b);
              break;
            case '/':
              System.out.println(a/b);
              break;
            case '%':
              System.out.println(a%b);
              break;
        }
	
}

}
`

[SaichaitanyareddyG]

`import java.util.Scanner;

class Main {
static int n2,n1;

public static void main(String[] args) {
       System.out.println("1.Add\n2.Subtract\n3.Multiplication\n4.Division\n5.Modulus\n6.Exit");
       int ch;
    do {
        Scanner s = new Scanner(System.in);
        
        System.out.printf("\nEnter your choice:");
    ch=s.nextInt();
              
        switch (ch) {
            
            case 1:
                System.out.printf("\nEnter first number:");
                n1=s.nextInt();
                System.out.printf("Enter second number:");
                n2=s.nextInt();
                System.out.format("Addition of %d and %d = %d",n1,n2,n1+n2);
                break;
            case 2:
                System.out.printf("\nEnter first number:");
                n1=s.nextInt();
                System.out.printf("Enter second number:");
                n2=s.nextInt();
                System.out.format("Subtraction of %d and %d = %d",n1,n2,n1-n2);
                break;
            case 3:
                System.out.printf("\nEnter first number:");
                 n1=s.nextInt();
                 System.out.printf("Enter second number:");
                n2=s.nextInt();
                System.out.format("Multiplication of %d and %d = %d",n1,n2,n1*n2);
                break;
            case 4:
                System.out.printf("\nEnter first number:");
                n1=s.nextInt();
                System.out.printf("Enter second number:");
                n2=s.nextInt();
                System.out.format("Division of %d and %d = %d",n1,n2,n1/n2);
                break;
            case 5:
                System.out.printf("\nEnter first number:");
                n1=s.nextInt();
                System.out.printf("Enter second number:");
                n2=s.nextInt();
                System.out.format("Modulus of %d and %d = %d",n1,n2,n1%n2);
                break;
            case 6:
                System.out.println("Exiting.......");
                break;
            default :
                System.out.println("Enter valid choice");
        }
    } while (ch!=6);

}

}
`

[sruthi-15-sketch]

import java.util.*;

class compute {
public void add(int a, int b) {
System.out.println("Addition of " + a + " and " + b + " gives " + (a + b));
}

public void sub(int a, int b) {
    System.out.println("Subtraction of " + a + " and " + b + " gives " + (a - b));
}

public void mul(int a, int b) {
    System.out.println("Multiplication of " + a + " and " + b + " gives " + (a * b));
}

public void div(int a, int b) {
    if (b != 0)
        System.out.println("Division of " + a + " and " + b + " gives " + (a / b));
    else
        System.out.println("Division by zero is not possible");
}

public void mod(int a, int b) {
    System.out.println("Modulo of " + a + " and " + b + " gives " + (a % b));
}

}

class calculator {
public static void main(String args[]) {
Scanner o = new Scanner(System.in);
System.out.println("Select the operation:");
System.out.println("1.Addition");
System.out.println("2.Subtraction");
System.out.println("3.Multiplication");
System.out.println("4.Division");
System.out.println("5.Modulo");
int choice = o.nextInt();
System.out.println("Enter the 2 values");
int a = o.nextInt();
int b = o.nextInt();
compute x = new compute();
switch (choice) {
case 1:
x.add(a, b);
break;
case 2:
x.sub(a, b);
break;
case 3:
x.mul(a, b);
break;
case 4:
x.div(a, b);
break;
case 5:
x.mod(a, b);
break;
default:
System.out.println("Wrong Choice");
}

}

}

[ratnadeepikavuddagiri]

import java.util.Scanner;

public class SimpleCalculator {
    public static void main(String[] args) {
        double val1, val2;
        char op;
        Scanner S = new Scanner(System.in);
        System.out.println("Enter the operands : ");
        System.out.println("operand 1 : ");
        val1 = S.nextDouble();
        System.out.println("operand 2 : ");
        val2 = S.nextDouble();
        System.out.println("Enter the operator:\nAddition(+)\nSubtraction(-)\nMultiplication(*)\nDivision(/)\nModulus(%):");
        op = S.next().charAt(0);
        switch (op) {
        case '+': System.out.println("Addition of " + val1 + " and " + val2 + " : " + (val1 + val2));
                  break;
        case '-': System.out.println("Subtraction of " + val1 + " and " + val2 + " : " + (val1 - val2));
                  break;
        case '*': System.out.println("Multiplication of " + val1 + " and " + val2 + " : " + (val1 * val2));
                  break;
        case '/': if(val2!=0)
                    System.out.println("Division of " + val1 + " and " + val2 + " : " + (val1 / val2));
                  else
                    System.out.println("Division by zero is not possible!");
                  break;
        case '%': System.out.println("Remainder when " + val2 + " divided by " + val1 + " : " + (val1 % val2));
                  break;
        default: System.out.println("Enter the correct operand");
        }
    }
}

[karunakar23]

`import java.util.;
public class Calci{
public static long addition(long value1,long value2){
return value1+value2;
}
public static long subtract(long value1,long value2){
return value1-value2;
}
public static long multiply(long value1,long value2){
return value1value2;
}
public static long divison(long value1,long value2){
return value1/value2;
}
public static long modulus(long value1,long value2){
return value1%value2;
}
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
System.out.println("Options to Perform Calculations");
System.out.println("Addition : 1");
System.out.println("Subtraction : 2");
System.out.println("multiplication : 3");
System.out.println("Divison : 4");
System.out.println("Modulus : 5");
System.out.println("");
System.out.print("Option for calculation :");
int option=sc.nextInt();
System.out.print("Value1 :");
long value1=sc.nextLong();
System.out.print("Value2 :");
long value2=sc.nextLong();
if(option==1){
System.out.println("Addition of "+value1+" and "+value2+" is :"+addition(value1,value2));
}else if(option==2){
System.out.println("Subtraction of "+value1+" and "+value2+" is :"+subtract(value1,value2));
}else if(option==3){
System.out.println("Multiplication of "+value1+" and "+value2+" is :"+multiply(value1,value2));
}else if(option==4){
System.out.println("Divison of "+value1+" and "+value2+" is :"+divison(value1,value2));
}else if(option==5){
System.out.println("Modulus of "+value1+" and "+value2+" is :"+modulus(value1,value2));
}else{
System.out.println("Please Select A Valid Option");
}

}

}
OUTPUT :
Options to Perform Calculations
Addition : 1
Subtraction : 2
multiplication : 3
Divison : 4
Modulus : 5

Option for calculation :3
Value1 :12344
Value2 :4464432
Multiplication of 12344 and 4464432 is :55108948608
`

[VigneshVishwa]

import.java.util.*;

class Calculator {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("1: Addition");
        System.out.println("2: Subtraction");
        System.out.println("3: Multiplication");
        System.out.println("4: Division");
        System.out.println("5: Reminder");
        int x = sc.nextInt();
        int a = sc.nextInt();
        int b = sc.nextInt();
        switch (x) {
            case 1:
                System.out.println(a + b);
                break;
            case 2:
                System.out.println(a - b);
                break;
            case 3:
                System.out.println(a * b);
                break;
            case 4:
                System.out.println(a / b);
                break;
            case 5:
                System.out.println(a % b);
                break;
            default:
                System.out.println("Invalid Input");
                break;
        }

    }
}
```

[Shubhi27]

`
import java.util.Scanner;

public class Calculator {

public static void add(int num1, int num2) {
    System.out.println("Addition of " + num1 + " and " + num2 + ": " + (num1 + num2));
}

public static void subtract(int num1, int num2) {
    System.out.println("Subtraction of " + num1 + " and " + num2 + ": " + (num1 - num2));
}

public static void multiply(int num1, int num2) {
    System.out.println("Multiplication of " + num1 + " and " + num2 + ": " + (num1 * num2));
}

public static void divide(int num1, int num2) {

    if (num2 == 0) {
        System.out.println("operation cannot be performed");
    } else {
        System.out.println("Division of " + num1 + " and " + num2 + ": " + ((double) num1 / num2));
    }
}

public static void modulus(int num1, int num2) {

    if (num2 == 0) {
        System.out.println("operation cannot be performed");
    } else {
        System.out.println("Modulus of " + num1 + " and " + num2 + ": " + (num1 % num2));
    }
}

// MAIN METHOD
public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    System.out.println("...<<Calculator>>...");
    System.out.println("1.Addition");
    System.out.println("2.Subtraction");
    System.out.println("3.Multiplication");
    System.out.println("4.Division");
    System.out.println("5.Modulus");
    System.out.println("6.Exit");
    while (true) {
        System.out.println("Enter operation:-");
        int op = sc.nextInt();
        if (op == 6) {
            break;
        } else if (op > 6) {
            System.out.println("Incorrect input!!!");
        } else {
            System.out.println("Enter First Number:-");
            int n1 = sc.nextInt();
            System.out.println("Enter Second Number:-");
            int n2 = sc.nextInt();

            switch (op) {
                case 1:
                    add(n1, n2);
                    break;
                case 2:
                    subtract(n1, n2);
                    break;
                case 3:
                    multiply(n1, n2);
                    break;
                case 4:
                    divide(n1, n2);
                    break;
                case 5:
                    modulus(n1, n2);
                    break;
                default:
                    break;

            }
        }
    }

}

}

`

[Gaurav-Joshi-31]

`
import java.util.Scanner;

public class Calculator {
static void add(int a, int b) {
System.out.println(a + " + " + b + " = " + (a + b));
}

static void subtract(int a, int b) {
    System.out.println(a + " - " + b + " = " + (a - b));
}

static void multiply(int a, int b) {
    System.out.println(a + " X " + b + " = " + (a * b));
}

static void divide(int a, int b) {
    if (b == 0)
        System.out.println("Cannot divide by 0!");
    else
        System.out.println(a + " / " + b + " = " + (a / b));
}

static void modulo(int a, int b) {
    if (b == 0)
        System.out.println("Cannot perform modulo by 0!");
    else
        System.out.println(a + " % " + b + " = " + (a % b));
}

public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    System.out.println(">>>>>>>>>>>>>>>>>>Calculator<<<<<<<<<<<<<<<<<<<<<");
    System.out.println("Menu -:");
    System.out.println("1- Addition\t2- Subtraction\t3- Multiply\t4- Divide\t5- Modulo\t0- Exit");

    int a, b, selection;
    while (true) {
        System.out.print("Enter Your Choice:");
        selection = sc.nextInt();
        if (selection == 0) {
            System.out.println("Thank You!!!");
            break;
        }

        else if (selection > 5)
            System.out.println("Enter valid choice!");
        else {
            System.out.println("Enter the numbers:");
            a = sc.nextInt();
            b = sc.nextInt();
            switch (selection) {
                case 1:
                    add(a, b);
                    break;

                case 2:
                    subtract(a, b);
                    break;

                case 3:
                    multiply(a, b);
                    break;

                case 4:
                    divide(a, b);
                    break;

                case 5:
                    modulo(a, b);
                    break;

                default:
                    break;

            }
        }

    }
    sc.close();

}

}

`

[Harshita-Joshi]

`
import java.util.Scanner;

public class Calculator {

// main function
public static void main(String[] args) {

    calc();

}

// calc function
public static void calc() {

    char ch;
    do {
        // Input two variables
        int a, b;
        Scanner scn = new Scanner(System.in);
        System.out.println("Enter the digits:");
        System.out.print("a = ");
        a = scn.nextInt();
        System.out.println();
        System.out.print("b = ");
        b = scn.nextInt();
        System.out.println();

        // Displaying Menu
        dispMenu();

        // Selecting operator

        ch = scn.next().charAt(0);

        // Determining result
        perfOperation(a, b, ch);

        System.out.println("Want to calculate more?");
        ch = scn.next().charAt(0);

    } while ((ch == 'y') || (ch == 'Y'));

}

// dispMenu function
public static void dispMenu() {
    System.out.println("Select an operator: ");
    System.out.println("1. + for Addition");
    System.out.println("2. - for Subtraction");
    System.out.println("3. * for Multiplication");
    System.out.println("4. / for Division");
    System.out.println("5. % for Modulus");
}

public static void perfOperation(int a, int b, char ch) {

    switch (ch) {
        case '+':
            System.out.println("The sum of " + a + " and " + b + " is: " + (a + b));
            break;

        case '-':
            System.out.println("The difference of " + a + " and " + b + " is: " + (a - b));
            break;

        case '*':
            System.out.println("The product of " + a + " and " + b + " is: " + a * b);
            break;

        case '/':
            if (b == 0)
                System.out.println("Division not possible!!");
            else
                System.out.println("The quotient when " + a + " divided by " + b + " is: " + (a / b));
            break;

        case '%':
            System.out.println("The remainder when " + a + " divided by " + b + " is: " + (a % b));
            break;

        default:
            System.out.println("Operator not defined!!");
    }
}

}

`

[preeti-max]

`package StringOperations;

import java.util.;
class Operations{
static int add(int a, int b){
return a+b;
}
static int sub(int a, int b){
return a-b;
}
static int mul(int a, int b){
return ab;
}
static void div(int a, int b){
double div=0;
try{
if(b==0)
throw new ArithmeticException();
div=(double)a/b;

        System.out.printf("The quotient on dividing %d by %d is : %f",a,b,div);
    }
    catch(ArithmeticException e){
        System.out.println("You cannot divide the number by 0.");

    }
    
}
static void remainder(int a,int b){
    int rem=0;
    try{
        rem=a%b;
        System.out.printf("The remainder on dividing %d by %d is : %d",a,b,rem);
        
    }
    catch(ArithmeticException e){
        System.out.println("You cannot divide the number by 0.");

    }

    
    
}

}

public class Calculator {

public static void main(String[] args) {

    Scanner sc = new Scanner(System.in);
    int choice, num1, num2;
char ch;
do {
    System.out.println("Enter the number corresponding to the operation you wish to perform");
    System.out.println("1. Addition \n2. Subtraction \n3. Multiplication \n4. Divison \n5. Modulus");
    choice = sc.nextInt();
    System.out.println("Enter num1 ");
    num1 = sc.nextInt();
    System.out.println("Enter num2 ");
    num2 = sc.nextInt();
   

    switch (choice) {
        case 1:
            System.out.println("Sum is " + Operations.add(num1, num2));
            break;
        case 2:
            System.out.println("Difference is " +Operations.sub(num1, num2));
            break;
        case 3:
            System.out.println("Multiplication is " + Operations.mul(num1, num2));
            break;
        case 4:
            Operations.div(num1,num2);
            break;
        case 5:
           Operations.remainder(num1,num2);
            break;
        default:
            System.out.println("You have choosed the wrong option.");

    }
    System.out.println("\nPress Y to continue");
    ch = sc.next().charAt(0);
} while (ch == 'Y' || ch == 'y');

}

}

`

[rsinghal57]

`
import java.util.*;
public class Main {

public static void main(String[] args)
{
	double n1, n2;
	Scanner sc = new Scanner(System.in);
	System.out.println("Enter the numbers");
	n1 = sc.nextDouble();
            n2 = sc.nextDouble();
            System.out.println("Enter the operation you want to perform (+,-,*,/,%)");
	char op = sc.next().charAt(0);
	double ans = 0;
	switch (op) {
	    
	case '+':

		ans= n1+n2;
		break;

	case '-':

		ans= n1-n2;
		break;

	case '*':

		ans= n1*n2;
		break;

	case '/':

		ans= n1/n2;
		break;
     
     case '%':
         ans=n1%n2;
         break;
         
	default:
		System.out.println("Sorry! You enter wrong input");
		break;
	}
	System.out.println("The result is:");
	System.out.println();
	System.out.println(n1 + " " + op + " " + n2+ " = " +ans);
}

}

`

[Vijey-A]

BasicCalculator

package Application;

import java.util.Scanner;

public class BasicCalculator {
  public static void main(String[] args) {
    Scanner sc=new Scanner(System.in);
    String myChoice="N";
    System.out.println("Enter two number to calculate: ");
    double num1=sc.nextDouble();
    double num2=sc.nextDouble();
    breakLoop:do{
    System.out.println("\nOperations\n\n1.Addition \n2.Subtraction\n3.Multiplication\n4.Division\n5.Modulus\n6.Exit");
    System.out.print("Enter your choice: ");
    int choice=sc.nextInt();
    switch(choice) {
      case 1:{
        System.out.println("\nAddition of two numbers: "+(num1+num2));
        break;
      }
      case 2:{
        System.out.println("\nSubtraction of two numbers: "+(num1-num2));
        break;
      }
      case 3:{
        System.out.println("\nMultiplication of two numbers: "+(num1*num2));
        break;
      }
      case 4:{
        System.out.println("\nDivision of two numbers: "+(num1/num2));
        break;
      }
      case 5:{
        System.out.println("\nModulo of two numbers: "+(num1%num2));
        break;
      }
      case 6:{
        break breakLoop;
      }
      default:{
        System.out.println("enter the Operator correctly.....");
      }
    }
    System.out.print("Do you want to continue? [Y/N]: ");
    myChoice = sc.next();
    }while(myChoice.equalsIgnoreCase("Y"));
  }
}

[kadhalish]

Calculator

import java.util.Scanner;

public class Calculator {
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        String c="N";
        do{  System.out.println("Enter number 1:");
        int a=Integer.parseInt(sc.nextLine());
        System.out.println("Enter number 2:");
        int b=Integer.parseInt(sc.nextLine());
            System.out.println("Enter the choice of calculator: ");
            System.out.println("1.Addition\n 2.Subtraction\n 3.Multiplication\n 4.Division\n 5.Modulus");
            int choice=Integer.parseInt(sc.nextLine());
          

            switch(choice){
                case 1:
                System.out.println("Sum of two numbers "+(a+b));
                break;

                case 2:
                System.out.println("The difference of two numbers "+(a-b));
                break;

                case 3:
                System.out.println("The Product of two numbers "+(a*b));
                break;

                case 4:{
                if(b!=0){
                System.out.println("The Quotient of two numbers "+(a/b));
                break;
                }
                else{
                System.out.println("Denominator should not be zero");
                break;}
                }
                case 5:{
                    System.out.println("The Remainder of two numbers "+(a%b));
                    break;
                }
                default:
                System.out.println("Invalid Operation...");
                break;
            }
            System.out.println("Want to Continue(Y/N)?");
            c=sc.nextLine();

        }while(c.equalsIgnoreCase("Y"));
        System.out.println("Operation Terminated");
        sc.close();
    }
}

[Shalini-Venugopal]

Calculator

public class Main
{
	public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String continueChoice = "N";
        do {
            System.out.println("Enter 2 numbers :: ");
            int num1 = sc.nextInt();
            int num2 = sc.nextInt();
            System.out.println("1. Addition");
            System.out.println("2. Subtraction");
            System.out.println("3. Multiplication");
            System.out.println("4. Division");
            System.out.println("5. Modulus");
            System.out.println("Choose any of the option above ::");
            int opt = sc.nextInt();
    
            int res = 0;
    
            switch (opt) {
                case 1:
                    res = num1 + num2;
                    System.out.println("Addition of 2 numbers is :: " + res);
                    break;
                case 2:
                    res = num1 - num2;
                    System.out.println("Subtraction of 2 numbers is :: " +res);
                    break;
    
                case 3:
                    res = num1 * num2;
                    System.out.println("Multiplication of 2 numbers is :: " +res);
                    break;
                case 4:
                    if (num2 != 0) {
                        res = num1 / num2;
                        System.out.println("Division of 2 numbers is :: " +res);
                        break;
                    }
                case 5:
                    if (num2 != 0) {
                        res = num1 % num2;
                        System.out.println("Modulus of 2 numbers is :: " +res);
                        break;
                    }
                default:
                    System.out.println("Invalid Option!!!");
                    break;
    
            }
            System.out.print("Do you want to continue? [Y/N]: ");
            continueChoice = sc.next();
        } while (continueChoice.equalsIgnoreCase("Y"));
        sc.close();
    }
}

[lakshmiparkav]

public class Calculator
{
	public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String continueChoice = "N";
    do {
        System.out.println("Enter 2 numbers :: ");
        int num1 = sc.nextInt();
        int num2 = sc.nextInt();
        System.out.println("1. Addition");
        System.out.println("2. Subtraction");
        System.out.println("3. Multiplication");
        System.out.println("4. Division");
        System.out.println("5. Modulus");
        System.out.println("Choose any of the option above ::");
        int opt = sc.nextInt();

        int res = 0;

        switch (opt) {
            case 1:
                res = num1 + num2;
                System.out.println("Addition of 2 numbers is :: " + res);
                break;
            case 2:
                res = num1 - num2;
                System.out.println("Subtraction of 2 numbers is :: " +res);
                break;

            case 3:
                res = num1 * num2;
                System.out.println("Multiplication of 2 numbers is :: " +res);
                break;
            case 4:
                if (num2 != 0) {
                    res = num1 / num2;
                    System.out.println("Division of 2 numbers is :: " +res);
                    break;
                }
            case 5:
                if (num2 != 0) {
                    res = num1 % num2;
                    System.out.println("Modulus of 2 numbers is :: " +res);
                    break;
                }
            default:
                System.out.println("Invalid Option!!!");
                break;

        }
        System.out.print("Do you want to continue? [Y/N]: ");
        continueChoice = sc.next();
    } while (continueChoice.equalsIgnoreCase("Y"));
    sc.close();
	}
}

[Sanjayee]

calculator.java

import java.util.Scanner;
class perform
{
    private int result;
    public int add(int a,int b)
    {
        result=a+b;
        return result;
    }
    public int sub(int a,int b)
    {
        result=a-b;
        return result;
    }
    public int mul(int a,int b)
    {
        result=a*b;
        return result;
    }
    public int div(int a,int b)
    {
        result=a/b;
        return result;
    }
    public int mod(int a,int b)
    {
        result=a%b;
        return result;
    }
}
public class calculator
{
    public static void main(String args[])
    {
        String continueChoice="N";
        perform p=new perform();
        Scanner sc=new Scanner(System.in);
        do
        {
            System.out.print("Enter the value of a:");
            int a=Integer.parseInt(sc.nextLine());
            System.out.print("Enter the value of b:");
            int b=Integer.parseInt(sc.nextLine());
            System.out.print("1.Addition\n2.Subtraction\n3.Multiplication\n4.Division\n5.Modulus\n6.Quit\n");
            int choice=Integer.parseInt(sc.nextLine());
            switch(choice)
            {
                case 1:
                    System.out.println(String.format("Result of %d + %d = %d",a,b,p.add(a,b)));
                    break;
                case 2:
                    System.out.println(String.format("Result of %d - %d = %d",a,b,p.sub(a,b)));
                    break;
                case 3:
                    System.out.println(String.format("Result of %d * %d = %d",a,b,p.mul(a,b)));
                    break;
                case 4:
                    if(a>b)
                        System.out.println(String.format("Result of %d / %d = %d",a,b,p.div(a,b)));
                    else
                    {
                        float a1=(float)a;
                        float b1=(float)b;
                        System.out.println(String.format("Result of %.0f / %.0f= %.2f ",a1,b1,a1/b1));
                    }
                    break;
                case 5:
                    char n='%';
                    System.out.println(String.format("Result of %d %c %d = %d",a,n,b,p.mod(a,b)));
                    break;
                case 6:
                    System.out.println("Thank you!!!");
                    System.exit(0);
                default:
                    System.out.println("Invalid Input");
                    break;
            }
            System.out.print("Do you want to continue? [Y/N]: ");
            continueChoice = sc.nextLine();
        }while (continueChoice.equalsIgnoreCase("Y"));
        sc.close();
    }
}

Output

[Tamilarasi-palanisamy]

1

Calculator.java

import java.util.Scanner;

public class Calculator {
    public static void main(String[] args){
        Scanner scanner = new Scanner(System.in);
        Scanner sc= new Scanner(System.in);
        String reply="N";
        do{
            System.out.println("Enter the number: ");
            int a=scanner.nextInt();
            System.out.println("Enter another number: ");
            int b=scanner.nextInt();
            System.out.println("Enter your Choice(1-5):");
            System.out.println("1.Addition: ");
            System.out.println("2.Subtraction: ");
            System.out.println("3.Division: ");
            System.out.println("4.Multiplication: ");
            System.out.println("5.Modulus: ");
            int choice=scanner.nextInt();
            switch(choice){           
                case 1:
                    int add=a+b;
                    System.out.println("The Addition of two numbers is: "+add);
                    break;
                case 2:
                    int sub=a-b;
                    System.out.println("The Subtraction of two numbers is: "+sub);
                    break;
                case 3:
                    int div=a/b;
                    System.out.println("The Division of two numbers is: "+div);
                    break;
                case 4:
                    int mul=a*b;
                    System.out.println("The Multiply of two numbers is: "+mul);
                    break;
                case 5:
                    int mod=a%b;
                    System.out.println("The Modulus of two numbers is: "+mod);
                    break;
                default:
                    System.out.println("Invalid input");
                    break;
            }
            System.out.println("Do you want to continue(Y/N)");
            reply=sc.nextLine();        
        }while(reply.equalsIgnoreCase("Y"));
            System.out.println("Thank you");   
    }
}

[sarathaselvam24]

import java.util.Scanner;
public class MainClass {
  static int num1,num2;
public static void twoNumbers(){
  Scanner sc = new Scanner(System.in);
  System.out.print("Enter first number ");
  num1 = sc.nextInt();
  System.out.print("Enter second number ");
  num2 = sc.nextInt();
}
  public static void main(String[] args) {
      Scanner sc = new Scanner(System.in);
      String continueChoice = "N";
      int userChoice1 = 0;
      System.out.println("Welcome to ATM Machine...");

      do {
          int userChoice = 0;
          System.out.println("1. Addition");
          System.out.println("2. Subtraction");
          System.out.println("3. Multiplication");
          System.out.println("4. Division");
          System.out.println("5. Modulos");
          System.out.println("6. Quite");
          System.out.print("Enter Choice[1-5]: ");
          userChoice = sc.nextInt();
          if(userChoice<6){
            twoNumbers();
          }
          switch (userChoice) {
              case 1:
                  num1 = num1+num2;
                  System.out.println("Addition of two numbers : "+num1);
                  break;
              case 2:
                  num1 = num1-num2;
                  System.out.println("Subtraction of two numbers : "+num1);
                  break;
              case 3:
                  num1 = num1*num2;
                  System.out.println("Multiplication of two numbers : "+num1);
                  break;
              case 4:
                  num1 = num1/num2;
                  System.out.println("Division of two numbers : "+num1);
                  break;
              case 5:
                  num1 = num1%num2;
                  System.out.println("Modulos of two numbers : "+num1);
                  break;
              case 6:
                  System.out.println("Quit");
                  userChoice1=userChoice;
                  break;
              default:
                  System.out.println("Invalid input. Please try again...");
                  break;
          }
          if(userChoice!=6){
          System.out.print("Do you want to continue? [Y/N]: ");
          continueChoice = sc.next();
          } // sentinel
      } while (userChoice1 != 6 && continueChoice.equalsIgnoreCase("Y"));
      
  }

}

[uzma23]

import java.util.Scanner;

public class menuDrivenCalc {
    public static void performOperation(int choice, int a, int b) {
        switch (choice) {
            case 1:
                add(a, b);
                break;
            case 2:
                subtract(a, b);
                break;
            case 3:
                multiply(a, b);
                break;
            case 4:
                divide(a, b);
                break;
            default:
                System.out.println("Ivalid Argument");
        }

    }

    private static void divide(int a, int b) {
        if (b == 0) {
            System.out.println("You can't divide " + a + " by 0");
            return;
        }
        System.out.println("Division of " + a + " and " + b + ": " + a / b);
    }

    private static void multiply(int a, int b) {
        System.out.println("Multiplication of " + a + " and " + b + ": " + a * b);
    }

    private static void subtract(int a, int b) {
        System.out.println("Subtraction of " + a + " and " + b + ": " + (a - b));
    }

    private static void add(int a, int b) {
        int sum = a + b;
        System.out.println("Addition of " + a + " and " + b + ": " + sum);
    }

    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);
        int choice = 1;
        System.out.println(" Simple Calculator");
        while (choice != 5) {
            System.out.println("1. Addition");
            System.out.println("2. Subtraction");
            System.out.println("3. Multiplication");
            System.out.println("4. Division");
            System.out.println("5. Exit");

            System.out.println("Enter Your Choice");
            choice = s.nextInt();
            System.out.println("Enter the two numbers:");
            int a = s.nextInt();
            int b = s.nextInt();
            performOperation(choice, a, b);
        }

    }

}

[vshvandana]

import java.util.*;

class calculator1 {

    public int add(int x, int y) {
        return x + y;
    }

    public int subtract(int x, int y) {
        return x - y;
    }

    public int multiply(int x, int y) {
        return x * y;
    }

    public int divide(int x, int y) {
        return (x / y);
    }
}

public class Method {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("Enter two numbers:");
        int a = sc.nextInt();
        int b = sc.nextInt();
        calculator1 calc = new calculator1();
        System.out.println("Addition: " + calc.add(a, b));
        System.out.println("Subtraction: " + calc.subtract(a, b));
        System.out.println("Multiplication: " + calc.multiply(a, b));
        System.out.println("Division: " + calc.divide(a, b));
    }
}

[Coder-093]

import java.util.*;

public class calctask3 {
  public static void main(String[] args) {
    Scanner scn = new Scanner(System.in);
    System.out.println("Enter the 1st number");
    int n1 = scn.nextInt();
    System.out.println("Enter the 2nd number");
    int n2 = scn.nextInt();
    int choice;
    char c;
    loop: do {
      System.out.println("Possible operations:\n1.add\n2.subtract\n3.multiply\n4.divide\n5.modulus\n6.quit\n");

      System.out.println("Enter your choice");
      choice = scn.nextInt();
      float res = 0;

      switch (choice) {
        case 1:
          res = add(n1, n2);
          break;
        case 2:
          res = sub(n1, n2);
          break;
        case 3:
          res = mul(n1, n2);
          break;
        case 4:
          res = div(n1, n2);
          break;
        case 5:
          res = mod(n1, n2);
          break;
        case 6:
          break loop;
        default:
          System.out.println("Enter a proper choice");
          break;
      }
      System.out.println("Do you want to continue?y/n");
      c = scn.next().charAt(0);

    } while (c == 'y' || c == 'Y');
    System.out.println("End of operation.");
  }

  public static float add(int n1, int n2) {
    float res = n1 + n2;
    System.out.println(n1 + " + " + n2 + " = " + res);
    return res;
  }

  public static float sub(int n1, int n2) {
    float res = n1 - n2;
    System.out.println(n1 + " - " + n2 + " = " + res);
    return res;
  }

  public static float mul(int n1, int n2) {
    float res = n1 * n2;
    System.out.println(n1 + " * " + n2 + " = " + res);
    return res;
  }

  public static float div(int n1, int n2) {
    float res = n1 / n2;
    System.out.println(n1 + " / " + n2 + " = " + res);
    return res;
  }

  public static float mod(int n1, int n2) {
    float res = n1 % n2;
    System.out.println(n1 + " % " + n2 + " = " + res);
    return res;
  }
}

[meghvi-raj]

import java.util.*;

public class D3 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("Welcome!");
        System.out.println("Enter number 1:");
        int num1 = sc.nextInt();
        System.out.println("Enter number 2:");
        int num2 = sc.nextInt();
        System.out.println("1. Addition");
        System.out.println("2. Subtraction");
        System.out.println("3. Multiplication");
        System.out.println("4. Division");
        System.out.println("5. Quit");
        System.out.print("Enter Choice[1-5]: ");
        int choice = sc.nextInt();
        performCalculations(choice, num1, num2);
        System.out.println("Thanks for visiting!");
    }

    public static void performCalculations(int choice, int num1, int num2) {
        D3 calc = new D3();

        switch (choice) {
            case 1:
                System.out.println("Result : " + calc.add(num1, num2));
                break;
            case 2:
                System.out.println("Result : " + calc.subtract(num1, num2));
                break;
            case 3:
                System.out.println("Result :" + calc.multiply(num1, num2));
                break;
            case 4:
                System.out.println("Result : " + calc.divide(num1, num2));
                break;
            case 5:
                break;
            default:
                System.out.println("Enter a valid choice");
                break;
        }
    }

    public static int add(int num1, int num2) {
        return num1 + num2;
    }

    public static int subtract(int num1, int num2) {
        return num1 - num2;
    }

    public static int multiply(int num1, int num2) {
        return num1 * num2;
    }

    public static int divide(int num1, int num2) {
        return num1 / num2;
    }
}

[ghost]

import java.util.Scanner;

public class d3 {

    public static void main(String[] args) {
        Scanner obj = new Scanner(System.in);
        int choice = 1;
        System.out.println("1. Addition");
        System.out.println("2. Subtraction");
        System.out.println("3. Multiplication");
        System.out.println("4. Division");
        System.out.println("5. Exit");

        while (true) {
            System.out.println("Enter Your Choice");
            choice = obj.nextInt();
            if (choice == 5)
                break;
            else {
                System.out.println("Enter the two numbers:");
                int a = obj.nextInt();
                int b = obj.nextInt();
                q1(choice, a, b);
            }
        }
    }

    public static void q1(int choice, int a, int b) {
        switch (choice) {
            case 1:
                add(a, b);
                break;
            case 2:
                subtract(a, b);
                break;
            case 3:
                multiply(a, b);
                break;
            case 4:
                divide(a, b);
                break;
            default:
                System.out.println("Please enter valid option");
        }
    }

    public static void divide(int a, int b) {
        if (b == 0) {
            System.out.println("Invalid input");
            return;
        }
        System.out.println("Division:" + a / b);
    }

    public static void multiply(int a, int b) {
        System.out.println("Multiplication:" + a * b);
    }

    public static void subtract(int a, int b) {
        System.out.println("Subtraction:" + (a - b));
    }

    public static void add(int a, int b) {
        int sum = a + b;
        System.out.println("Addition" + sum);
    }

}

[gayatribabar]

import java.net.SocketPermission;
import java.util.Scanner;

public class HelloWorld {
    public static void main(String[] args) {
        String s;
        Scanner sc = new Scanner(System.in);
        do {
            System.out.println("Enter a number: ");
            int x1 = sc.nextInt();
            System.out.println("Enter another number: ");
            int x2 = sc.nextInt();

            System.out.println("Calculator\n 1.Add \n 2.Substract \n 3.Multiplication \n 4.Division \n 5.Quit");
            int n = sc.nextInt();
            switch (n) {
                case 1:
                    add(x1, x2);
                    break;
                case 2:
                    sub(x1, x2);
                    break;
                case 3:
                    mul(x1, x2);
                    break;
                case 4:
                    div(x1, x2);
                    break;
                case 5:
                    System.exit(0);
            }
            System.out.println("If you want to continue enter Y else enter any other character");
            s = sc.next();

        } while (s.equals("Y"));

    }

    public static void add(int x, int y) {
        System.out.println(x + y);
    }

    public static void sub(int x, int y) {
        System.out.println(x-y);
    }

    public static void mul(int x, int y) {
        System.out.println(x * y);
    }

    public static void div(int x, int y) {
        System.out.println(x / y);
    }

}

[ghost]

import java.util.*;

public class prime {
    public static int add(int x, int y) {
        return (x + y);
    }

    public static int sub(int x, int y) {
        return (x - y);
    }

    public static int mul(int x, int y) {
        return (x * y);
    }

    public static int div(int x, int y) {
        return (x / y);
    }

    public static void main(String[] args) {
        String s;
        Scanner sc = new Scanner(System.in);
        do {
            System.out.println("Enter first number: ");
            int num1 = sc.nextInt();
            System.out.println("Enter second number: ");
            int num2 = sc.nextInt();

            System.out.println(
                    "Choose an option below: \n 1.Add \n 2.Substract \n 3.Multiplication \n 4.Division \n 5.Quit");
            int n = sc.nextInt();
            switch (n) {
                case 1:
                    System.out.println(add(num1, num2));

                    break;
                case 2:
                    System.out.println(sub(num1, num2));

                    break;
                case 3:
                    System.out.println(mul(num1, num2));

                    break;
                case 4:
                    System.out.println(div(num1, num2));
                    break;
                case 5:
                    System.exit(0);
            }
            System.out.println("Please enter [Y/N] to proceed further");
            s = sc.next();

        } while (s.equals("Y"));

    }

}

[NavneetBais]

import java.util.* ;
public class Main
{
	public static void main(String[] args) {
	    Scanner sc = new Scanner(System.in);
		System.out.println("Welcome");
		String userChoice ; 
		do{
		    userChoice ="" ;
		    System.out.println("Enter First Number: ");
		    int n1 = Integer.parseInt(sc.nextLine()) ; 
		    System.out.println("Enter Second Number: ");
		    int n2 = Integer.parseInt(sc.nextLine()); 
		    
		    System.out.println("1. Addition");
		    System.out.println("2. Substraction");
		    System.out.println("3. Multiplication");
		    System.out.println("4. Division");
		    System.out.println("5. Quit");
		    System.out.println("Enter Choice [1-5] : ");
		    
		    int result = 0 ;
		    int option = Integer.parseInt(sc.nextLine()) ;
		    
		    switch(option){
		        
		        case 1 :
		            result = n1+n2 ;
		            System.out.println("Result : " + result);
		            System.out.println("Do you want to continue?[Y/N] : ");
		            userChoice = sc.nextLine();
		            break;
		        case 2 :
		            result = n1 - n2 ;
		            System.out.println("Result : "  + result);
		            System.out.println("Do you want to continue?[Y/N] : ");
		            userChoice = sc.nextLine();
		            break;
		        case 3 : 
		            result = n1*n2;
		            System.out.println("Result : " + result);
		            System.out.println("Do you want to continue?[Y/N] : ");
		            userChoice = sc.nextLine();
		            break;
		        case 4 : 
		            result =n1/n2 ;
		            System.out.println("Result : " + result);
		            System.out.println("Do you want to continue?[Y/N] : ");
		            userChoice = sc.nextLine();
		            break;
		        case 5 :
		            System.out.println("Thank you for visiting");
                    break ; 
                default :
                    System.out.println("Invalid Option, Please try again.");
                    userChoice = "Y" ;
                    break;
		        
		    }
		    
		}while(userChoice.equalsIgnoreCase("Y"));
		if(userChoice.equalsIgnoreCase("N")){
		    System.out.println("Thank you for using the calculator.");
		}
	}
	
	
}