#n的阶乘就是1*2*3*...*n-1*n
def jiecheng(n):
if n == 0:
return 1
else:
return n * jiecheng(n-1)
n = int(input('请输入一个数n:'))
print(jiecheng(n))
#n的阶乘就是1*2*3*...*n-1*n
def jiecheng(n):
if n == 0:
return 1
else:
return n * jiecheng(n-1)
n = int(input('请输入一个数n:'))
print(jiecheng(n))