How to check if a number is a power of 2 in JavaScript

In this Article we will go through how to check if a number is a power of 2 only using single line of code in JavaScript. This is a one-line JavaScript code snippet that uses one of the most popular ES6 features => Arrow Function.

Let's define this short function:

const isPowerOfTwo = number => (number & (number - 1)) === 0;

isPowerOfTwo(256);      // true
isPowerOfTwo(129);      // false