Python--数的阶乘

迭失法

def factoral(n):
    result = n
    for i in range(1,n):
        result *= i
    return result
number = int(input('请输入一个整数：'))
print(factoral(number))

递归

def factoral(n):
    if n == 1:
        return 1
    else:
        return n * factoral(n-1)

number = int(input('请输入一个整数：'))
print(factoral(number))