how to add a ',' after every third digit from right to left?
this code works fine if your dealing with a # that has 2 decimal places (i.e. 1223.00 will return 1,223.00 - but 1223 will crash and give error):
----------------------------------------------------------------------var amount = localStorage.getItem('test2')
function CommaFormatted(amount) {
var delimiter = ","; // replace comma if desired
amount = new String(amount);
var a = amount.split('.',2)
var d = a[1];
var i = parseInt(a[0]);
if(isNaN(i)) { return ''; }
var minus = '';
if(i < 0) { minus = '-'; }
i = Math.abs(i);
var n = new String(i);
var a = [];
while(n.length 3)
{
var nn = n.substr(n.length-3);
a.unshift(nn);
n = n.substr(0,n.length-3);
}
if(n.length 0) { a.unshift(n); }
n = a.join(delimiter);
if(d.length < 1) { amount = n; }
else { amount = n + '.' + d; }
amount = minus + amount;
return amount;
}
localStorage.setItem('test2', CommaFormatted(localStorage.getItem('test2')));
-----------------------------------------------------------------------------I need to be able to just add commas to whatever the # is, regardless of decimals
