---
title: formatNumber
tags: string,math,beginner
firstSeen: 2020-07-30T11:38:51+03:00
lastUpdated: 2020-10-22T20:23:47+03:00
---

Formats a number using the local number format order.

- Use `Number.prototype.toLocaleString()` to convert a number to using the local number format separators.

```js
const formatNumber = num => num.toLocaleString();
```

```js
formatNumber(123456); // '123,456' in `en-US`
formatNumber(15675436903); // '15.675.436.903' in `de-DE`
```