JavaScript: Check if a given number is even or not

JavaScript fundamental (ES6 Syntax): Exercise-202 with Solution

Check Even Number

Write a JavaScript program to check if a given number is even or not.

• Checks whether a number is odd or even using the modulo (%) operator.
• Returns true if the number is even, false if the number is odd.

Sample Solution:

JavaScript Code:

// Define a function 'isEven' that checks if a number 'num' is even
const isEven = num => num % 2 === 0;

// Test cases to check if numbers are even
console.log(isEven(3));   // false (3 is not even)
console.log(isEven(32));  // true (32 is even)
console.log(isEven(1));   // false (1 is not even)
console.log(isEven(0));   // true (0 is even)

Output:

false
true
false
true

Flowchart:

Live Demo:

See the Pen javascript-basic-exercise-202-1 by w3resource (@w3resource) on CodePen.

For more Practice: Solve these Related Problems:

• Write a JavaScript program that returns true if a given number is even, false otherwise, using bitwise operators.
• Write a JavaScript function that determines evenness by checking the least significant bit of a number.
• Write a JavaScript program that iterates over an array and filters out odd numbers using a custom even check.
• Write a JavaScript function that tests a number’s evenness using both modulo and bitwise methods for comparison.

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