Format number as currency in JavaScript

When working with financial data in JavaScript, it’s important to be able to format numbers as currency. This can be achieved using the `toLocaleString` method in JavaScript.

Example:

Let’s say we have a number representing a dollar amount:

let amount = 1000;
let formattedAmount = amount.toLocaleString('en-US', {style: 'currency', currency: 'USD'});
console.log(formattedAmount); // output: $1,000.00
    

Explanation:

In the above example, we use the `toLocaleString` method with the following parameters:

• 'en-US' – the locale parameter to specify the format based on US standards.
• {style: 'currency', currency: 'USD'} – an options object specifying the style as currency and the currency type as USD.

Conclusion:

Formatting numbers as currency in JavaScript is essential for displaying financial data in a user-friendly and professional manner. The `toLocaleString` method provides a simple and effective way to achieve this formatting.