def fib(limit):
    global result
    n = 1
    a1 = 1
    a2 = 1
    if limit > 2:
        while n < limit - 1:
            result = a1 + a2
            a1 = a2
            a2 = result
            n += 1
        print("Fib({}) = {}".format(n + 1, result))
    elif limit == 2:
        print('Fib({}) = {}'.format(2, a2))
    elif limit == 1:
        print('Fib({}) = {}'.format(1, a1))
    elif limit == 0:
        print('Fib({}) = {}'.format(0, 0))
    else:
        pass