Question

python中n的阶乘

Answer 1

n = 10
res = 1
for i in range(2, n + 1):
res *= i

Answer 2

num = int(input("请输入一个数字: "))

factorial = 1

num = int(input('请输入数字n:')

   for i in range(1,num + 1):

       factorial = factorial*i

   print("%d 的阶乘为 %d" %(num,factorial))

#下面用递归函数做一下：

def factorial(num):
if num == 1:
return num
return factorial(num-1)*num

n = int(input('请输一个整数：'))
print(factorial(n))