用while循环python写阶乘
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Write factorial with while loop python
提问by R overflow
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 can make it in an if / elif else statement:
我可以在 if / elif else 语句中实现：
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)
But I want to do this with a while loop (no function).
但我想用一个 while 循环（无功能）来做到这一点。
采纳答案by John Gordon
while num > 1:
factorial = factorial * num
num = num - 1
回答by leongold
If you just want to get a result: math.factorial(x)
如果你只是想得到一个结果：math.factorial(x)
While loop:
虽然循环：
def factorial(n):
num = 1
while n >= 1:
num = num * n
n = n - 1
return num
回答by dinesh palem
number = int(input("Enter number:"))
factorial = 1
while number>0:
factorial = factorial * number
number = number - 1
print(factorial)
回答by Max
Make it easy by using the standard library:
使用标准库使其变得容易：
import math
print(math.factorial(x))
回答by aravinda Challa
a=int(input("enter the number : "))
result = 1
i=1
while(i <= a):
result=i*result
i=i+1
print("factorial of given number is ", format(result))
回答by Akash Rajpuria
I will implement the recursive function using while loop ---Factorial----
(1)It will call the fact function recursively based on while a condition
我将使用while循环实现递归函数---Factorial----
(1)它会根据while一个条件递归调用fact函数
def fact(num):
while num>1:
return num*fact(num-1)
else:
return num
result = fact(3)
print(result)
6
6
