Question

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Place commas in Javascript integers

I have a variable containing a number in JavaScript and I want to display it with commas in all the right places. So, for 222222 I need 222,222 and for 1000333 I need 1,000,333. What’s the simplest way to do this?

Answer 1

Try this:

function addGrouping(val, grouper) {
    val += '';
    x = val.split('.');
    x1 = x[0];
    x2 = x.length > 1 ? '.' + x[1] : '';
    var rgx = /(\d+)(\d{3})/;
    while (rgx.test(x1)) {
        x1 = x1.replace(rgx, '$1' + grouper + '$2');
    }
    return x1 + x2;
}

addGrouping(1231.897243, ",")
// 1,231.897243

Example fiddle