How to define a constant in Unity using C#

Constants are "constantly" used in the Unity projects, they are working like the global config settings. Some features of the constants:

• Define only once
• Can't be changed

// define a constant variable in a class
public class Constants {
      public const int LIVES = 3;
}


// use the constant
public class Player : MonoBehaviour
{
    int lives;
 
    void Awake()
    {
        lives = Constants.LIVES;
    }
}