Multiple RETURNS within a single subroutine

[ukemigrant]

Having multiple return statements like that has no effect on the stack, the return statement only comes into play when it is executed.

However it's a programming style question that comes up now and again and one I contemplate again and again.

When I see horrible code like this:

IF A THEN
  IF  B THEN
    IF C THEN
      IF D THEN
        do something
      END IF
    END IF
  END IF
END IF

I want to change it to

IF NOT A THEN
  RETURN

IF NOT B THEN
  RETURN
...
etc

because from a debugging and comprehension standpoint I find it easier to be able to get out of the processing chain as soon as possible. I don't want to have to work through all those nested IFs wondering what's going to happen next.

It's easier for me to read, write and test.