Global vs Local behaviour

[kharpster]

I am fairly new to the HP Prime, but I think the correct way to declare a global variable so that it behaves as you expect is like this:

Code:


stg;
EXPORT str(stg)
BEGIN      
  return stg;
END;

If you change the value of the global variable used within the program the initial value will of course be lost (replaced):

Code:


stg;
EXPORT str(stg)
BEGIN      
  stg := 32;
  return stg;
END;

From my testing it would seem that the first place a variable is defined is where it's scope is assigned. Therefore if you define the variable as global even if you define the variable again inside of the BEGIN/END it remains a global and not a local variable, which could be confusing. Having the editor check to see if a variable has already been defined would be nice, but a little design effort can also avoid these types of problems.

Code:


stg;
EXPORT str(stg)
BEGIN 
  stg;     
  return stg;
END;