25 lines
614 B
Python
25 lines
614 B
Python
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# Based on https://github.com/AllAlgorithms, python/algorithms/math/exponentiation.py
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def exponentiation(baseNumber: int, power: int) -> float:
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assert not (baseNumber == 0 or power <= 0)
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answer = None
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if power > 1:
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halfAnswer = exponentiation(baseNumber, power//2)
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answer = halfAnswer * halfAnswer
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if power%2 == 1:
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answer *= baseNumber
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elif power == 1:
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answer = baseNumber
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elif power == 0:
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answer = 1
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else: # negative power
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answer = 1 / exponentiation(baseNumber, abs(power))
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return answer
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