为什么对应的sum=0 sum=n+sum无结果

```def r(k):
    if k==1:
        name=input('hello,your name:')
        sum=0
        sum=sum+n
        return
    if k>1:
        names=['kkkk','kssd']
        for name in names:
            print(names)
            return


>>> r(4)
['kkkk', 'kssd']
>>> r(1)
hello,your name:rot
>>> 
>>> 
>>> 

return修改为return name
另外n这个变量似乎多余，不知道你要干嘛