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Tip of the Day
Language: C++
Expertise: Beginner
Oct 24, 2000

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Significance of const Return

Question:
What is the significance of const return type from a function? Similar to:

 const int func1();

Answer:
The const in this position guarantees that the caller of the function doesn't change the returned value. Note that the use of const in a function's return value is more useful when the function returns a reference or a pointer to, say an object's data member. It's less useful when return-by-value is used (as in your example) because the caller gets a local copy of the variable. Therefore, there's not much point in limiting the use of the caller's own copy.

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