Variables and Constants in C++

Variables and Constants in C++ — a practical guide to C++ variables constants with clear examples you can reuse in real projects.

C++ Tutorial Series (12/111). Prefer one article? Read the complete C++ tutorial.

Short description

Initialize before use; prefer const by default when values don’t change.

Variables

int count = 0;
const double pi = 3.14159;
constexpr int max_n = 100;