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