True or False: A function returns a value, whereas a subroutine (void method) cannot return a value via the return keyword.
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ATrue
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BFalse
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C—
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D—
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E—
Answer
Correct Answer: True
Explanation
Introduction / Context:This statement distinguishes between a function (which returns a value) and a subroutine (a void method in C#) that does not return a value using the return keyword.
Given Data / Assumptions:
- Function: non-void return type.
- Subroutine: void return type.
Concept / Approach:In C#, a method with a non-void return type must return a value compatible with its signature. A void method cannot use return with a value. Nonetheless, a void method may still communicate results via ref/out parameters, which does not contradict the statement about the return keyword.
Step-by-Step Solution:
Identify return behavior: functions produce a value; void methods do not.Clarify that alternate output paths (ref/out) do not change the return type semantics.Verification / Alternative check:Check compiler rules: returning a value from a void method is illegal.
Why Other Options Are Wrong:
- False: Would imply void methods can return values via return, which is incorrect.
Common Pitfalls:Confusing ref/out outputs with the return value itself.
Final Answer:True