Exam-style question
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Why is it good practice to use local variables inside subroutines where appropriate?.
- A.They limit access to values and reduce unintended interference with other parts of the program
- B.They ensure that every subroutine can directly change the same value
- C.They make variables available after the subroutine has finished
- D.They remove the need to declare variables
Model answer
What a good answer should say
- They limit access to values and reduce unintended interference with other parts of the program
Explanation
Why this works
Restricting a variable to the subroutine that uses it makes the program easier to understand and reduces the risk of accidental changes elsewhere.
Common mistake
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