You can include none at all if the function is being used as a procedure and has no useful return value.

如果函数被用作一个过程，并且没有任何有用的返回值，那么可以不包含return语句。

youdao

You can include none at all if the function is being used as a procedure and has no useful return value.

如果函数被用作一个过程，并且没有任何有用的返回值，那么可以不包含return语句。

youdao