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GitHub Repository: jackfrued/Python-100-Days
Path: blob/master/Day01-15/code/Day06/function1.py
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"""
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函数的定义和使用 - 计算组合数C(7,3)
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Version: 0.1
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Author: 骆昊
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Date: 2018-03-05
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"""
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# 将求阶乘的功能封装成一个函数
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def factorial(n):
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    result = 1
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    for num in range(1, n + 1):
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        result *= num
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    return result
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print(factorial(7) // factorial(3) // factorial(4))
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