You're writing extremely bad code if that's the case and you need to refactor. The point of a function is to return a value. Anything else is just there to waste cycles and make the code less readable. You should also never use else statements for arithmetic due to their massive relative overhead. Your processor can do multiple arithmetic operations in the time it takes to process one if statement, and don't get me started on people who demand you use nested if even though switch statements are way faster and leagues more readable.