tvl-depot/users/wpcarro/scratch/facebook/nth-fibonacci.py
Vincent Ambo 019f8fd211 subtree(users/wpcarro): docking briefcase at '24f5a642'
git-subtree-dir: users/wpcarro
git-subtree-mainline: 464bbcb15c
git-subtree-split: 24f5a642af
Change-Id: I6105b3762b79126b3488359c95978cadb3efa789
2021-12-14 02:15:47 +03:00

13 lines
357 B
Python

# 0, 1, 1, 2, 3, 5
def fib(n):
if n < 0:
raise Exception("Need to supply an index that's >= 0. Not: {}".format(n))
elif n in {0, 1}:
return n
state = [0, 1]
for i in range(1, n):
state[0], state[1] = state[1], state[0] + state[1]
return state[-1]
for i in range(10):
print("fib({}) => {}".format(i, fib(i)))