How do I use the const keyword in C++?

What does the const keyword do in C++?

The const keyword in C++ is used to define constants, which are variables that cannot be modified after their initial assignment.

Can you give me an example of using const in a function?

Sure! You can use const in function parameters to prevent modification. For example: void printValue(const int value) { std::cout << value; }.

What happens if I try to change a const variable?

If you try to change a const variable, the compiler will throw an error, indicating that the variable is read-only.

Are there any best practices for using const?

Yes, it's best to use const whenever possible to improve code safety and readability, especially for function parameters and return types.