What are some common use cases for constants in C++?

What are some common use cases for constants in C++?

Constants in C++ are used to define fixed values that do not change during program execution. Common use cases include defining mathematical constants, configuration settings, and error codes.

Can you give me an example of a constant in a C++ program?

Sure! You can define a constant for the value of Pi like this: const double PI = 3.14159; This can be used in calculations involving circles.

Why should I use constants instead of regular variables?

Using constants improves code readability and maintainability. It prevents accidental changes to values that should remain fixed, reducing bugs.

Are there different types of constants in C++?

Yes, in C++, you can have const variables, constexpr for compile-time constants, and enumerations which also serve as named constants.

How do constants affect performance in C++?

Constants can enhance performance by allowing the compiler to optimize code better, as their values are known at compile time.