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

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

Using const in C++ helps to prevent accidental modification of variables, improves code readability, and can enable compiler optimizations.

Can you give an example of how const can optimize performance?

Sure! When you declare a function parameter as const, the compiler can make optimizations knowing that the parameter won't change, potentially reducing overhead.

Are there any downsides to using const?

One downside is that it can make your code less flexible, as you cannot modify const variables. It may also lead to more complex code if overused.

How does const differ from constexpr?

const defines a variable that cannot be changed after initialization, while constexpr defines a variable that must be initialized with a constant expression and can be evaluated at compile time.