first.js

/*FullName="Tony Stark";
FullName=25;
console.log(FullName);
Price=199.90;
x=null;
console.log(x);
y=undefined;
console.log(y);
isfollow=true;
console.log(Price);
console.log(isfollow);*/
/*let FullName="Tony Stark";
let Price=199;//we can update the variable but we can't redeclare the variable so we will use this for better coding;
let age=19;
age=67;
console.log(Price);
console.log(FullName);
console.log(age);*/
/*
var age=59;//in it we can update and redeclare a variable many times that causes confusion

var age=27;

var age=19;
console.log(age);*/
//const FullName="tony stark";
//console.log(FullName);// in it we can't update or redeclare a variable;//
/*{
    let a=5;
}//we can redeclare let variable in different blocks;
{
    let a=10;
}*/
/*let age=24;
let price=199.5;
let FullName="tony stark";
let isFollow=true;
let x=null;
let y=BigInt("23445");
let z=Symbol("Hello!");*/
/*const students = {
     FullName:" Tony Stark",
     RollNO :21,
     age:20,
     cgpa:8.9,
     isPass:true,  
};
students["age"] = students["age"] + 1;
console.log(students.FullName);
console.log(students.RollNO);
console.log(students.age);
console.log(students.cgpa);
*/
/*const Product ={
 title:"Ball Pen",
 rating: 4,
 offer:5,
 Price:249,
};
console.log(Product);*/

const Profile ={
    UserName: "@Shardha khapra",
    followers: 5690000,
    following:4,
    posts:195,
    Details:"Apna College | ex-microsoft employee,DRDO",
    isFollow: false,
};
console.log(Profile);