输入n 计算n的阶乘，要用递归算法，python，谢谢大神！

Question

如题所述

Answer 1

def fact(n):
if n==0:
return 1
else:
return n*fact(n-1)

n=int(input())
print(fact(n))

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Answer 2

def factorial(num):#num=3
"""
使用递归法求阶乘
"""
sum = 0
while num > 0:
if num > 1:
sum+=num*factorial(num-1)
num-=1
return sum
else:
return 1
# pass
num = int(input("请输入想要求的阶乘:\n"))
result = factorial(num)

print("result=%d"%result)