Comlpex if statement not working in tibasic

Question

I'm making a game that requires some complex if statements, here is the code that doesn't work

If K=25 and not(Y=1) and not([A](X,Y-1)=1)
Then
... Other Code ...
End

but it works when I do

If K=25 and not(Y=1)
Then
If not([A](X,Y-1)=1)
Then
.. Other Code ..
End
End

What's the problem?

score 1 · Answer 1 · answered Jun 20 '21 at 19:57

A problem with a condition such as not(Y=1) and not([A](X,Y-1)=1) (by the way you can use the ≠ operator instead of combining not( with =) is that both sides of the and in TI-BASIC are always evaluated (in contrast to how it works in many other languages). That means that if Y is actually 1, then the expression on the right hand side is still evaluated but it fails with an INVALID DIM error. So, unfortunately, conditions like that must be split up.

Thanks, I split the conditions with labels, it looks nicer – The Code Guy Jun 21 '21 at 08:59 — The Code Guy, Jun 21 '21 at 08:59

Comlpex if statement not working in tibasic

1 Answers1