And we did that because by definition those are the first two terms of the fibonacci sequence and then also entering into in the loop we defined i as beeing equal to... i as beeing equal to 2 and we do that because we've already defined the 0th term and the 1st term and so now we want to as we enter the loop... start... we want to add... we want to add the second term as we go into the loop and then we say while i is less than or equal to n.