JavaScript Program to Check Even or Odd Number

To check if a number is even or odd in JavaScript, you can use the following approach:

1. First, define a function that takes an argument num. This argument will be the number that you want to check.

function checkEvenOdd(num) {
  // code to check if num is even or odd
}

2. Inside the function, you can use the modulo operator (%) to check if the number is divisible by 2. If the number is divisible by 2, it is even. Otherwise, it is odd.

function checkEvenOdd(num) {
  if (num % 2 == 0) {
    console.log(num + " is even");
  } else {
    console.log(num + " is odd");
  }
}

3. To test the function, you can call it with different numbers as arguments.

checkEvenOdd(2); // Output: 2 is even
checkEvenOdd(3); // Output: 3 is odd
checkEvenOdd(4); // Output: 4 is even

Here is the complete code:

function checkEvenOdd(num) {
  if (num % 2 == 0) {
    console.log(num + " is even");
  } else {
    console.log(num + " is odd");
  }
}

checkEvenOdd(2); // Output: 2 is even
checkEvenOdd(3); // Output: 3 is odd
checkEvenOdd(4); // Output: 4 is even

Rakib Alom

About author

I am a professional web developer. I love programming and coding, and reading books. I am the founder and CEO of StorialTech.