[Programming] Treat like an adress, not like a number

[grsbanks]

As far as I know, you can't pass a variable to a function by reference.

What you can do is:

* return a value and assign it to the variable when returning from the function

* if you wanted to pass more than one variable by reference then return a list of values and pick the return values out of the list upon returning

* make sure the variable that you want to pass to the function is global pass its name to the function in a string, then within the function, append ":=value" to the string and then do EXPR(yourString)