if num == 0: return 【2】 else:

# 递归： 只举个简单的例子吧，计算：指定数字的阶乘

def factorial(num):

    if num == 1:

        return 1

    else:

        return num * factorial(num - 1)

print(factorial(2))  # 2*1

print(factorial(3))  # 3*2*1

print(factorial(4))  # 4* 3* 2*1

print(factorial(5))  # 5*4*3*2*1

print(factorial(10))

'''

2

6

24

120

3628800

Process finished with exit code 0

'''

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