What is the purpose of the const qualifier in C++?

What is the purpose of the const qualifier in C++?

The const qualifier in C++ is used to define constants, ensuring that a variable's value cannot be changed after initialization.

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 modify a const variable?

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

Are there any best practices for using const in C++?

Yes, it's best to use const for function parameters, return types, and class member functions to enhance code safety and clarity.