How to check if a number is odd in JavaScript

In this Article we will go through how to check if a number is odd 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 isOdd = number => number % 2 !== 0;


const isOdd = number => !!(number & 1);


const isOdd = number => !Number.isInteger(number / 2);


isOdd(1);   // true
isOdd(2);   // false