Loops alternate recursive ways

[bplus]

Yes a GoSub routine does need double dots AKA a colon after the label name, well you might do it with a line number but yuck!

You could probably start a recursive routine with start value, easier with a Sub or Function than a GoSub, maybe?
Subs and Functions have a STATIC tool which would be handy for things like that.
It'd be tricky for GoSub because it has no private variables from main routine that contains it.