Python实现阶乘函数的两种方法

迭代

• 利用for循环&range()

def factorial(number):
product = 1
for i in range(number):
product = product * (i+1)
return product

递归

• 利用if-else条件判断&调用自身

def factorial(number):
if number <= 1:
return 1
else:
return number*factorial(number-1)

总结