Re: [M100] BASIC trick

[Peter Vollan]

That is just a more verbose way of saying what I already said.
On Sun, 9 Dec 2018 at 19:04, John R. Hogerhuis <jho...@pobox.com> wrote:
>
> "  It seems that a limitation of the model
> 100 is that if you gosub to a subroutine, and then gosub again, it
> will forget that it is it in a subroutine, and not understand the
> retrurn statement."
>
> That's not how it works. GOSUB stacks addresses. It means your gosubs and 
> returns are not balanced, which is a bug in your code.
>
> Think of a GOSUB as pushing the location of the next BASIC command onto a 
> stack.
>
> At some point, you RETURN and it pops that location from the stack and jumps 
> there.
>
> If you get a "RETURN without GOSUB" it means you tried to RETURN when the 
> stack was empty!
>
> -- John.