Question

Given a number 12456789, I need to output 12,456,789 without much coding. Are there any built-in functions in either C, C++, or JavaScript I can use to do that?

Answer 1

I found this little javascript function that would work (source):

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;
}