Which is the right way to declare constant in C?

In C, you can declare a constant using the `#define` preprocessor or the `const` keyword.

1. Using `#define`:

#define PI 3.14

This tells the preprocessor to replace all occurrences of `PI` with `3.14` during compilation.

2. Using `const`:

“`c

const float pi = 3.14;

This tells the compiler that the variable `pi` is a constant, which means its value cannot be altered throughout the program.

Both methods are correct for declaring a constant in C, with the choice depending on the specific needs and context of your program.