Exam-style question
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What is one advantage of using a named constant instead of repeatedly writing the same literal value?.
- A.It makes the value impossible for the program to use
- B.It can make the program easier to understand and update
- C.It guarantees that the program contains no errors
- D.It means that all variables become constants
Model answer
What a good answer should say
- It can make the program easier to understand and update
Explanation
Why this works
A meaningful name communicates the purpose of the value. If the value needs changing, it can be changed in one named declaration rather than in multiple places.
Common mistake
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