New Js files

Kondareddy1209 · Kondareddy1209 · commit 80a77ce42233 · 2026-02-25T13:22:11.000+05:30
diff --git a/Access_object_value.js b/Access_object_value.js
@@ -0,0 +1,16 @@
+// WRONG: k is a key string, not an object[Accessing object value incorrectly❌ WRONG]
+
+// let obj = { place: "kadapa" };
+// for (let k in obj) {
+//     if (k.place === "kadapa") {
+//         console.log("He is from kadapa");
+//     }
+// }
+
+
+//corrected version
+// CORRECT: access value using obj[key] or obj.place
+let obj = { place: "kadapa" };
+if (obj.place === "kadapa") {
+    console.log("He is from kadapa");
+}
diff --git a/append.js b/append.js
@@ -0,0 +1,10 @@
+// WRONG: append() does not exist in JS[Using append() instead of push() ❌ WRONG]
+
+// let k = [];
+// k.append(1);
+
+
+//corrected version 
+// CORRECT: use push() in JavaScript
+let k = [];
+k.push(1);
diff --git a/array_length.js b/array_length.js
@@ -0,0 +1,18 @@
+// WRONG: k.length is array length, not string length[Checking array length instead of string length❌ WRONG]
+
+// let k = ["123456"];
+// for (let i of k) {
+//     if (k.length > 5) {
+//         console.log("Not valid");
+//     }
+// }
+
+
+//corrected version
+// CORRECT: check length of each string
+let k = ["123456"];
+for (let i of k) {
+    if (i.length > 5) {
+        console.log("Not valid");
+    }
+}
diff --git a/else_with_while.js b/else_with_while.js
@@ -0,0 +1,19 @@
+// WRONG: while loop cannot have else in JavaScript[else with while (invalid syntax) ❌ WRONG]
+
+// let i = 5;
+// while (i < 10) {
+//     console.log(i);
+// } else {
+//     console.log("Out of bounds"); // syntax error
+// }
+
+// CORRECT: use if-else outside the loop
+let i = 5;
+if (i < 10) {
+    while (i < 10) {
+        console.log(i);
+        i++;
+    }
+} else {
+    console.log("Out of bounds");
+}
diff --git a/for_in.js b/for_in.js
@@ -0,0 +1,18 @@
+// WRONG: for...in gives index, not value[for...in used instead of for...of❌ WRONG]
+
+// let k = ["hello"];
+// for (let i in k) {
+//     if (i.length > 5) { // i is "0"
+//         console.log("Not valid");
+//     }
+// }
+
+
+//corrected version
+// CORRECT: for...of gives actual value
+let k = ["hello"];
+for (let i of k) {
+    if (i.length > 5) {
+        console.log("Not valid");
+    }
+}
diff --git a/function_call.js b/function_call.js
@@ -0,0 +1,20 @@
+// WRONG: function is never called[Function NOT called (comma operator mistake)❌ WRONG – full code]
+// const getUser = (name, age, place) => {
+//     return [name, age, place];
+// };
+
+// // This does NOT call the function
+// let result = ("konda", 21, "kadapa");
+
+// console.log(result); // prints only "kadapa"
+
+
+//corrected version
+// CORRECT: call the function properly
+const getUser = (name, age, place) => {
+    return [name, age, place];
+};
+
+let result = getUser("konda", 21, "kadapa");
+
+console.log(result);
diff --git a/function_test.js b/function_test.js
@@ -0,0 +1,14 @@
+let n=Number(prompt("Enter the number of elements in Array: "));
+let m=[];
+for (let i=0;i<=n;i++){
+    m[i+1]= i ;
+}
+console.log(m);
+console.log(typeof(m));
+
+let d=(cur,pre)=>{
+    s=cur+pre;
+    console.log(s);
+}
+let k=(4,5);
+console.log(k)
diff --git a/multiple_return.js b/multiple_return.js
@@ -0,0 +1,36 @@
+// WRONG: function stops at first return[Multiple return statements❌ WRONG – full code]
+
+
+// function getData(name, age, place) {
+//     let arr = [];
+
+//     for (let i = 0; i <= 3; i++) {
+//         arr.push(i);
+//     }
+
+//     return arr;      // function exits here
+//     return name;     // ❌ unreachable code
+// }
+
+// let result = getData("konda", 21, "kadapa");
+// console.log(result);
+
+
+// CORRECT: return everything as a single object
+function getData(name, age, place) {
+    let arr = [];
+
+    for (let i = 0; i <= 3; i++) {
+        arr.push(i);
+    }
+
+    return {
+        name: name,
+        age: age,
+        place: place,
+        numbers: arr
+    };
+}
+
+let result = getData("konda", 21, "kadapa");
+console.log(result);
diff --git a/new.html b/new.html
@@ -6,7 +6,8 @@
     <title>Document</title>
 </head>
 <body>
-    <script src="functions.js"></script>
+    <script src="function_test.js"></script>
 </body>
 
+
 </html>
diff --git a/odd_or_even.js b/odd_or_even.js
@@ -0,0 +1,14 @@
+// let k = Number(prompt("Enter the number"));
+// if (k / 2 == 0) {
+//     console.log("Odd");
+// } else {
+//     console.log("Even");
+// }
+
+//corrected code 
+let k = Number(prompt("Enter the number"));
+if (k % 2 == 0) {
+    console.log("Odd");
+} else {
+    console.log("Even");
+}
diff --git a/prompt_version.js b/prompt_version.js
@@ -0,0 +1,8 @@
+// WRONG: prompt accepts only ONE argument[Wrong prompt() usage❌ WRONG]
+
+// prompt("Enter the", 5, "characters");
+
+
+//corrected version
+// CORRECT: pass one string (use template literal if needed)
+prompt(`Enter 5 characters`);
diff --git a/prompt_without_paras.js b/prompt_without_paras.js
@@ -0,0 +1,21 @@
+// WRONG: prompt must use ()[prompt without parentheses❌ WRONG – full code]
+
+// const getName = () => {
+//     let name = prompt "Enter name"; // ❌ syntax error
+//     return name;
+// };
+
+// let result = getName();
+// console.log(result);
+
+
+//corrected version
+
+// CORRECT
+const getName = () => {
+    let name = prompt("Enter name");
+    return name;
+};
+
+let result = getName();
+console.log(result);
diff --git a/undeclared_version.js b/undeclared_version.js
@@ -0,0 +1,30 @@
+// WRONG: n becomes a global variable[Undeclared variable (n) ❌ WRONG – full code]
+
+// const generateNumbers = () => {
+//     let arr = [];
+//     n = Number(prompt("Enter number")); // ❌ no let
+
+//     for (let i = 0; i <= n; i++) {
+//         arr.push(i);
+//     }
+
+//     return arr;
+// };
+
+// let result = generateNumbers();
+// console.log(result);
+
+// CORRECT: declare variable with let
+const generateNumbers = () => {
+    let arr = [];
+    let n = Number(prompt("Enter number")); // ✅ declared
+
+    for (let i = 0; i <= n; i++) {
+        arr.push(i);
+    }
+
+    return arr;
+};
+
+let result = generateNumbers();
+console.log(result);
diff --git a/using_prompt_inside_function.js b/using_prompt_inside_function.js
@@ -0,0 +1,32 @@
+// WRONG: function depends on prompt (hard to reuse) [Using prompt() inside function (bad design) ❌ WRONG – full code]
+
+// const buildArray = () => {
+//     let arr = [];
+//     let n = Number(prompt("Enter number"));
+
+//     for (let i = 0; i <= n; i++) {
+//         arr.push(i);
+//     }
+
+//     return arr;
+// };
+
+// let result = buildArray();
+// console.log(result);
+
+
+//corrected vesion
+
+// CORRECT: pass values as parameters
+const buildArray = (n) => {
+    let arr = [];
+
+    for (let i = 0; i <= n; i++) {
+        arr.push(i);
+    }
+
+    return arr;
+};
+
+let result = buildArray(5);
+console.log(result);
diff --git a/while.js b/while.js
@@ -0,0 +1,17 @@
+// WRONG: if condition repeats while condition [Redundant condition inside while loop ❌ WRONG ]
+// let i = 1;
+// while (i < 10) {
+//     if (i < 10) { // always true
+//         console.log(i, "Konda");
+//     }
+//     i++;
+// }
+
+
+//corrected version 
+// CORRECT: while condition alone is enough
+let i = 1;
+while (i < 10) {
+    console.log(i, "Konda");
+    i++;
+}
diff --git a/wrong_function.js b/wrong_function.js
@@ -0,0 +1,22 @@
+// WRONG: function expects 3 parameters, only 1 is passed[Wrong function arguments count ❌ WRONG – full code]
+
+// const userInfo = (name, age, place) => {
+//     return [name, age, place];
+// };
+
+// let result = userInfo(prompt("Enter name"));
+// console.log(result); // age & place = undefined
+
+//corrected version
+// CORRECT: pass all required arguments
+const userInfo = (name, age, place) => {
+    return [name, age, place];
+};
+
+let result = userInfo(
+    prompt("Enter name"),
+    Number(prompt("Enter age")),
+    prompt("Enter place")
+);
+
+console.log(result);
