True or False: Variables are never used to pass information to a subroutine.

• A. True
• B. Sometimes
• C. False
• D. Not at all

Answer: (C)

Data can be handed to a subroutine through its parameters, and the values often come from variables in the calling context. When you call a subroutine, you pass the contents of variables as arguments, so the subroutine receives the data it needs to perform its task. In many languages you can also pass by reference or use pointers, which lets the subroutine access and potentially modify the original variables. This use of variables to supply information to subroutines is a standard and essential pattern in programming. Therefore, the statement that variables are never used to pass information is false.