Hi, I've read my textbook over a few times and I'm still having problems grasping the following information. What is the difference between a

Hi, I've read my textbook over a few times and I'm still having problems grasping the following information.

1. What is the difference between a Reference vs a Static Variable? When would you use either and why?
2. Why and When would you use a VOID function but use a Reference Variable? Why wouldn't you use a value returning function?