And then we go over here fibonacci(4) well fibonacci(4), the fourth fibonacci term is the sum of the third and the second fibonacci term which we have already figured out they are two and one, you just take their sum and get 3 the third fibonacci term, by the definition of the fibonacci sequence is the sum of the first and the second term those are each one the sum of one plus one is two the fifth term, the fifth fibonacci number the fifth fibonacci term is the sum of the fourth and the third terms those are three and two so three plus two is five so this things right over here is going to evaluate to 5