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add doctest/document to actual_power and document to power (#11187)

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* Update power.py

* Update divide_and_conquer/power.py

---------

Co-authored-by: Tianyi Zheng <tianyizheng02@gmail.com>
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Pedram_Mohajer 2024-06-01 05:09:03 -04:00 committed by GitHub
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divide_and_conquer/power.py
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@ -2,6 +2,20 @@ def actual_power(a: int, b: int):
"""
Function using divide and conquer to calculate a^b.
It only works for integer a,b.
:param a: The base of the power operation, an integer.
:param b: The exponent of the power operation, a non-negative integer.
:return: The result of a^b.
Examples:
>>> actual_power(3, 2)
9
>>> actual_power(5, 3)
125
>>> actual_power(2, 5)
32
>>> actual_power(7, 0)
1
"""
if b == 0:
return 1
@ -13,6 +27,10 @@ def actual_power(a: int, b: int):
def power(a: int, b: int) -> float:
"""
:param a: The base (integer).
:param b: The exponent (integer).
:return: The result of a^b, as a float for negative exponents.
>>> power(4,6)
4096
>>> power(2,3)