phpjs/functions/math/abs.js

php.js offers community built php functions in javascript

function abs(mixed_number) {
  // From: http://phpjs.org/functions
  // +   original by: Waldo Malqui Silva
  // +   improved by: Karol Kowalski
  // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
  // +   improved by: Jonas Raoni Soares Silva (http://www.jsfromhell.com)
  // *     example 1: abs(4.2);
  // *     returns 1: 4.2
  // *     example 2: abs(-4.2);
  // *     returns 2: 4.2
  // *     example 3: abs(-5);
  // *     returns 3: 5
  // *     example 4: abs('_argos');
  // *     returns 4: 0
  return Math.abs(mixed_number) || 0;
}