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Put Comma Values in Numbers

/ Published in: JavaScript
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This function assumes what is being submitted to it is a string, with a decimal point and two places after the decimal. To get your number into that format first, use this.

Then this function will properly comma separate the number. For example, 2345643.00 will return 2,345,643.00

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  1. function CommaFormatted(amount) {
  2.      var delimiter = ","; // replace comma if desired
  3.      var a = amount.split('.',2)
  4.      var d = a[1];
  5.      var i = parseInt(a[0]);
  6.      if(isNaN(i)) { return ''; }
  7.      var minus = '';
  8.      if(i < 0) { minus = '-'; }
  9.      i = Math.abs(i);
  10.      var n = new String(i);
  11.      var a = [];
  12.      while(n.length > 3) {
  13.           var nn = n.substr(n.length-3);
  14.           a.unshift(nn);
  15.           n = n.substr(0,n.length-3);
  16.      }
  17.      if(n.length > 0) { a.unshift(n); }
  18.      n = a.join(delimiter);
  19.      if(d.length < 1) { amount = n; }
  20.      else { amount = n + '.' + d; }
  21.      amount = minus + amount;
  22.      return amount;
  23. }

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