How to truncate a number at decimal in JavaScript

In this Article we will go through how to truncate a number at decimal 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 truncate = n => ~~n;

truncate(25.198726354);         // 25
truncate(-25.198726354);        // -25