用while循环python写阶乘 [英] Write factorial with while loop python

问题描述

我是新手，对 Python 了解不多.有人知道如何在 while 循环中编写阶乘吗?

I am new and do not know a lot about Python. Does anybody know how you can write a factorial in a while loop?

我可以在 if/elif else 语句中实现:

I can make it in an if / elif else statement:

num = ...
factorial = 1

if num < 0:
   print("must be positive")
elif num == 0:
   print("factorial = 1")
else:
   for i in range(1,num + 1):
       factorial = factorial*i
   print(num, factorial)

但我想用一个 while 循环(没有函数)来做到这一点.

But I want to do this with a while loop (no function).

推荐答案

while num > 1:
    factorial = factorial * num
    num = num - 1

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