🟨 JavaScript Practice Answers – Part 3 Loops (for / while)

JavaScript Practice Questions – Part 3 (Answers)

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🔹 Answer 31 – Print Numbers

for (let i = 1; i <= 10; i++) {

    console.log(i);

}

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🔹 Answer 32 – Even Numbers

for (let i = 1; i <= 20; i++) {

    if (i % 2 === 0) {

        console.log(i);

    }

}

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🔹 Answer 33 – Sum of Numbers

let sum = 0;

for (let i = 1; i <= 10; i++) {

    sum += i;

}

console.log("Sum =", sum);

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🔹 Answer 34 – Multiplication Table

let num = 5;

for (let i = 1; i <= 10; i++) {

    console.log(num + " x " + i + " = " + (num * i));

}

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🔹 Answer 35 – Reverse Counting

for (let i = 10; i >= 1; i--) {

    console.log(i);

}

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🔹 Answer 36 – Count Digits

let num = 12345;

let count = 0;

while (num > 0) {

    count++;

    num = Math.floor(num / 10);

}

console.log("Digit count =", count);

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🔹 Answer 37 – Factorial

let num = 5;

let fact = 1;

for (let i = 1; i <= num; i++) {

    fact *= i;

}

console.log("Factorial =", fact);

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🔹 Answer 38 – Fibonacci Series

let n = 7;

let a = 0, b = 1;

for (let i = 1; i <= n; i++) {

    console.log(a);

    let next = a + b;

    a = b;

    b = next;

}

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🔹 Answer 39 – Prime Number

let num = 7;

let prime = true;

if (num <= 1) {

    prime = false;

}

for (let i = 2; i < num; i++) {

    if (num % i === 0) {

        prime = false;

        break;

    }

}

if (prime) {

    console.log("Prime Number");

} else {

    console.log("Not a Prime Number");

}

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🔹 Answer 40 – while Loop Example

let i = 1;

while (i <= 5) {

    console.log(i);

    i++;

}

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Kalvi Vaanam Note:
Loops concept strong ஆக build பண்ண இந்த programs daily practice பண்ணுங்க 👍