Return the factorial of the provided integer.

gistfile1.txt

// Bonfire: Factorialize a Number
// Author: @piqueen314
// Challenge: http://www.freecodecamp.com/challenges/bonfire-factorialize-a-number
// Learn to Code at Free Code Camp (www.freecodecamp.com)

function factorialize(num) {
  var fac=1;
  if (num ===0){
    return fac;
  }
  
  for(var i=1; i<=num; i++)
    {
      fac = i*fac;

    }
  return fac;
}

factorialize(5);