Return in a PL/SQL Procedure – Just one more thing Mum never told me

Functions return values. Procedures pass out parameters. That’s the way it is, that’s the way it’s always been. Or that’s what I thought up until recently.
Turns out that procedures can return too. I don’t know why I hadn’t realised this before. Maybe I’m just too set in my ways, or maybe it’s not just me.
Yes, I hear you cry, but RETURN in a procedure won’t pass back a value, so why would it be useful ? Time for another trivial example…