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Javascript method to round decimal values

/ Published in: JavaScript
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call the method like so: onkeypress="return inputLimiter(event, 'Numbers', this.value, 5);"

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  1. function roundNumber(number, decimal_points) {
  2.             if (!decimal_points) return Math.round(number);
  3.             if (number == 0) {
  4.                 var decimals = "";
  5.                 for (var i = 0; i < decimal_points; i++) decimals += "0";
  6.                 return "0." + decimals;
  7.             }
  8.  
  9.             var exponent = Math.pow(10, decimal_points);
  10.             var num = Math.round((number * exponent)).toString();
  11.             return num.slice(0, -1 * decimal_points) + "." + num.slice(-1 * decimal_points)
  12.         }

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