dcsimg
TODAY'S HEADLINES  |   ARTICLE ARCHIVE  |   FORUMS  |   TIP BANK
Browse DevX
Sign up for e-mail newsletters from DevX


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

WEBINAR:

On-Demand

Building the Right Environment to Support AI, Machine Learning and Deep Learning


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.

DevX Pro
 
Thanks for your registration, follow us on our social networks to keep up-to-date