Exam-style question
Try this first
What is the main purpose of a parameter in a subroutine?.
- A.To pass data into the subroutine
- B.To permanently store every value used by the program
- C.To stop the subroutine from being called
- D.To display the subroutine's results automatically
Model answer
What a good answer should say
- A parameter provides a way for data to be passed to a subroutine when it is called.
Explanation
Why this works
Parameters allow a subroutine to receive data from the part of the program that calls it. This makes the subroutine usable with different data values.
Common mistake
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