What to check when writing in BASIC?

If you want to see it download Parser

I shall not be doing anything more with it, so treat it how you like.

Thanks Steve! Downloaded and will look into it. :)

“I think BBC BASIC behavior should be fixed and a LOCAL should be LOCAL only to the function. we could add a new keyword called SHARED if we want a variable to be shared with all the functions in the relative call-stack.”

No, you do it the other way around, you introduce something new to indicate something new.

And it’s already been done: PRIVATE
https://www.bbcbasic.co.uk/bbcwin/manual/bbcwin7.html#private

JGH jogged our memory with

It is important that your program does not ‘jump out’ of a function/procedure whilst PRIVATE variables are in use (e.g. as the result of an ON ERROR statement)

Aha, the perennial LOCAL bug that afflicts (by compatible necessity) all versions of BBC Basic.

I fixed it in my version, which allows many related issues to be solved too: