So I have a value in Javascript:

var val = Entry.val;

One example of this value is 277385. How do I, in Javascript, convert this number to 277,385, as well as any number to that so it has mas in the correct spots?

So I have a value in Javascript:

var val = Entry.val;

One example of this value is 277385. How do I, in Javascript, convert this number to 277,385, as well as any number to that so it has mas in the correct spots?

• javascript
• localization

4 Answers 4

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

via here.

This should do it for you:

Function:

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

Usage:

addCommas(1000)
// 1,000

addCommas(1231.897243)
// 1,231.897243

Thanks to mredjk.

val.replace(/(\d{1,3})(?=(?:\d{3})+$)/g,"$1,")

:-)

I'm not sure why the other answers split the number on a decimal point- you can replace, starting with a digit,until there are no more digits. It will quit when it runs out of digits or hits a non-digit.

function addCommas(n){
    var rx= /(\d+)(\d{3})/;
    return String(n).replace(/^\d+/, function(w){
        while(rx.test(w)) w= w.replace(rx,'$1,$2');
        return w;
    });
}