def factorial(n):
result = n
for i in range(1, n):
result *= i
return result
number = int(input("请输入一个正整数："))
result = factorial(number)
print("%d的阶乘是：%d" %(number, result))
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def factorial(n):
if n == 1:
return 1
else:
return n* factorial(n - 1)
number = int(input("请输入一个正整数："))
result = factorial(number)
print("%d的阶乘是：%d" %(number, result))原文：http://blog.51cto.com/13842013/2165626