php.js/sqrt.js

Use phpjs functions as required.

module.exports=function(){ return sqrt.apply(exports,arguments) };

function sqrt(arg) {
  //  discuss at: http://phpjs.org/functions/sqrt/
  // original by: Onno Marsman
  //   example 1: sqrt(8723321.4);
  //   returns 1: 2953.5269424875746

  return Math.sqrt(arg);
}