format number function javascript comma code example

Example 1: format money javascript commas

function formatMoney(n) {
    return "$ " + (Math.round(n * 100) / 100).toLocaleString();
}

n = 2123000;
// =>2,123,000

Example 2: add comma to number javascript

var n = 34523453.345
n.toLocaleString()
"34,523,453.345"