What does it mean with "return()"?

Answer 1

The return statement causes your function to exit and hand back a value to its caller. The point of functions in general is to take in inputs and return something. The return statement is used when a function is ready to return a value to its caller.

Answer 2

The "return" statement returns a value from a function. If the return statement is absent or nothing is returned, then "none" is returned from the function. You can return a single value or multiple values. Multiple values returned will return a tuple.