python函数入门

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递归方式实现阶乘

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def factorial(num) -> int:
    if num > 1:
        return num * factorial(num - 1)
    else:
        return num
print(factorial(3))

python函数入门例子

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def sum(*args) -> int:
    '''
    文档字符串
    sum函数，可以输入不定长度的数字参数，返回int类型
    '''
    print(args)
    total = 0
    for i in args:
        total += i
   print( locals())
    return total

ls=(1,2,3,4,5)
sum(*ls)