What are const references in C++?

Can you explain what const references are in C++?

Sure! A const reference in C++ is a reference that cannot be used to modify the value it refers to. It ensures that the data remains unchanged.

Why would I use const references instead of regular references?

Using const references can improve performance by avoiding unnecessary copies of large objects, and it also provides safety by preventing modifications.

Can you give me an example of using const references?

Of course! Here's a simple example:

void printValue(const int &value) {
    std::cout << value << std::endl;
}

In this function, value is a const reference, so it cannot be modified inside the function.

Are there any limitations to using const references?

Yes, you cannot use const references to modify the object they refer to, and they must be initialized when declared.