What are the benefits of using const references in C++?

What are the benefits of using const references in C++?

Using const references in C++ helps to avoid unnecessary copying of objects, improving performance.

Can you explain how it improves performance?

Sure! When you pass large objects by value, a copy is made, which can be costly. Const references allow you to pass the original object without copying.

Are there any downsides to using const references?

One downside is that you cannot modify the object being referenced. If you need to change the object, you'll have to pass it by non-const reference or by value.

When should I prefer const references over pointers?

Prefer const references when you want to ensure the object isn't modified and you don't need to manage memory manually, unlike pointers.