http://www.freecodecamp.com/thetinybeaker 's solution for Bonfire: Factorialize a Number

bonfire-factorialize-a-number.js

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

function factorialize(num) {
  if (num === 0){
    return 1;
  }
  else if (num < 0){
    return -1;
  }
  
  else {
    return (num * factorialize(num-1));
  }
  
}


factorialize(5);