python 实现的阶乘计算以及计算阶乘结果中0的个数

python 实现的阶乘计算以及计算阶乘结果中0的个数

# !/usr/bin/python3
# -*- coding: utf-8 -*-
"""
@Author         :  JHC
@Version        :  
------------------------------------
@File           :  Scrapy/test01.py
@Description    :  JHC 
@CreateTime     :  2021/12/20 21:11
------------------------------------
@ModifyTime     :  
"""
def jiecheng(n):
    count = 0
    sum = 1
    num = n+1
    lis = list(range(1,num))
    for i in lis:
        sum *= i
        while sum%10 == 0:
            count += 1
            sum /= 10
        sum%=10
    print(count)


def jiecheng2(n):
    from functools import reduce
    num = n+1
    sum = reduce(lambda x,y:x*y,range(1,num))
    print(sum)


if __name__ == '__main__':
    n=input('请输入要计算的数；')
    jiecheng(int(n))
    jiecheng2(int(n))