What is the difference between constexpr and const in C++17?

Can you explain the difference between constexpr and const in C++17?

Sure! In C++17, constexpr indicates that a variable or function can be evaluated at compile time, while const means that a variable's value cannot be changed after initialization.

Are there any specific use cases for using constexpr?

Yes, constexpr is particularly useful for defining constant expressions that can be used in template parameters or for optimizing performance by allowing computations at compile time.

Can I use constexpr with functions?

Absolutely! You can define functions as constexpr, allowing them to be evaluated at compile time if the arguments are also constant expressions.

What happens if I try to modify a constexpr variable?

If you try to modify a constexpr variable, it will result in a compilation error, as constexpr variables are inherently constant.