Internationalizing Numbers (Intl) In JavaScript

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Internationalizing Numbers (Intl) In JavaScript

In JavaScript, you can use the Intl object to internationalize numbers. The Intl object provides a set of functions for formatting and parsing numbers according to different locales.

To format a number using Intl, you can use the NumberFormat constructor. The constructor takes two arguments: the locale and an options object. The options object can be used to specify various formatting options, such as the style of the number, the number of decimal places, and the use of grouping separators.

Here’s an example that formats a number using the user’s locale and the default formatting options:

const number = 12345.67;
const formatter = new Intl.NumberFormat();
const formattedNumber = formatter.format(number);
console.log(formattedNumber);

This will output the number in the user’s locale using the default formatting options, which may include grouping separators and a decimal point or comma, depending on the locale.

You can also customize the formatting options by passing an options object to the NumberFormat constructor. Here’s an example that formats a number using a specific locale and custom formatting options:

const number = 12345.67;
const options = { style: 'currency', currency: 'USD', minimumFractionDigits: 2 };
const formatter = new Intl.NumberFormat('en-US', options);
const formattedNumber = formatter.format(number);
console.log(formattedNumber);

Output

$12,345.67

This will format the number using the “en-US” locale, and will display the number as a currency with the symbol “USD”, with two decimal places.