Place commas in Javascript integers

Question

So I have a value in Javascript:

var val = Entry.val;

One example of this value is 277385. How do I, in Javascript, convert th

Answer 1

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.

Answer 2

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;
    });
}

Answer 3

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

:-)

Answer 4

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.com