How to check if a number is an integer in JavaScript?

January 31, 2022

To check if a number is an integer in JavaScript, use the Number.isInteger function.

Here's how you do it:

const twoIsInteger = Number.isInteger(2);
const twoPointFiveIsInteger = Number.isInteger(2.5);

console.log(twoIsInteger); // true
console.log(twoPointFiveIsInteger); // false