python中return语句的三种用法

>>> def a(x,y):

>>>     if x==y:

>>>         return x,y

```python

>>> def fun(a,b):

    print (a)

    return a

    print (b)

    return b

>>> resunlt = fun(2,6)

2

```

def recurve(a,b):

     if a%b==0:

         return b

     else:

         gcd(b,a%b)