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dfb4ce4074
* Finding Exponent Program * Build Error Fix - 1 * Build Error Fix - 2 * Error Fix - 1 datatype * self-documenting naming convension added * Update and rename exponent_recursion.py to power_using_recursion.py * Fix typo * Fix typo Co-authored-by: Christian Clauss <cclauss@me.com>
37 lines
1.0 KiB
Python
37 lines
1.0 KiB
Python
"""
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== Raise base to the power of exponent using recursion ==
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Input -->
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Enter the base: 3
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Enter the exponent: 4
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Output -->
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3 to the power of 4 is 81
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Input -->
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Enter the base: 2
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Enter the exponent: 0
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Output -->
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2 to the power of 0 is 1
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"""
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def power(base: int, exponent: int) -> float:
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"""
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power(3, 4)
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81
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>>> power(2, 0)
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1
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>>> all(power(base, exponent) == pow(base, exponent)
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... for base in range(-10, 10) for exponent in range(10))
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True
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"""
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return base * power(base, (exponent - 1)) if exponent else 1
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if __name__ == "__main__":
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print("Raise base to the power of exponent using recursion...")
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base = int(input("Enter the base: ").strip())
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exponent = int(input("Enter the exponent: ").strip())
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result = power(base, abs(exponent))
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if exponent < 0: # power() does not properly deal w/ negative exponents
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result = 1 / result
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print(f"{base} to the power of {exponent} is {result}")
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