Tip of the day! Label scope. The more structured your program is, the less need you'll have for labels. But what happens if you need a label in a function and you accidentally reuse a label from your main program?

SmileBASIC doesn't mind! Labels defined within a function are considered local to that function, and do not count as duplicates if the same label is used elsewhere.

Moreover, GOTO cannot be used to travel between functions. If you try to GOTO a label defined inside a function from your main program, or vice versa, the program will throw an undefined label error.

RESTORE works a bit differently. You CAN reference global labels from inside a function; this example lets you read the 5 just fine.

However, this won't work. You can't use RESTORE at the global level to get at a function's data; this code throws an error.

What about this? A RESTORE inside a function will favor a local label over a global one. In this example, we read the 2, not the 5.

What about this?! Actually, it works just fine. Once you've set the data position with RESTORE, you can READ that data from anywhere else in the program.

There's probably not going to be many reasons to structure your program in such a confusing way to begin with, but it never hurts to know the rules.

Throwing so much stuff at use, we are dying.

Very good information about scope in functions. Thank you much Ed!