Text Processing with JavaScript

Recipe 15

Adding Thousand Separators to Numbers with Intl.NumberFormat()

Task

Suppose you aim to add a thousands separator to numbers consisting of four or more digits. Perhaps you are retrieving financial data from a database to use in an article for a finance publication that is published in multiple languages.

Thousand separators are used in many different languages and countries to make large numbers easier to read. However, the character used as the thousand separator can vary across languages and cultures.

For example, let’s say you have the following string:

1000000000

And you’d like to format it as:

1,000,000,000

You need to write code to add thousand separators programmatically to the number.

Solution

Use the Intl.NumberFormat() constructor: ...