Adding separator to a number in JavaScript

Question

I have a number of unknown length and i need to format it by adding comma after every 3rd number from the right (so 12345678 becomes 12,345,678). As of now i'm using this chaos to do it

value.toString().split('').reverse().join('').match(/.{1,3}/g).reverse().map( (num) => num.split('').reverse().join('') ).join()

Is there any cleaner way to do it with native functionality?

Possible duplicate of [How to print a number with commas as thousands separators in JavaScript](https://stackoverflow.com/questions/2901102/how-to-print-a-number-with-commas-as-thousands-separators-in-javascript) — Eddie, Jun 13 '18 at 14:12

Vikasdeep Singh · Accepted Answer · 2019-02-07T05:15:09.560

8

Check out below the simplest way to do this:

let number = 12345678;

console.log(number.toLocaleString("en"));

Reference -> here

edited Feb 07 '19 at 05:15

answered Jun 13 '18 at 14:14

Vikasdeep Singh

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Adding separator to a number in JavaScript

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