Finding factorial of an integer by using for loop in JavaScript.

bonfire-factorialize-a-number#.js

// Bonfire: Factorialize a Number
// Author: @shahrzadmn
// Challenge: http://www.freecodecamp.com/challenges/bonfire-factorialize-a-number#
// Learn to Code at Free Code Camp (www.freecodecamp.com)

function factorialize(num) {
  var i = num;
  var newNum = 1;
  for (i; i > 1; i--){
    newNum *= i;
  }
  return newNum;
}

factorialize(5);