Most Unity scripts attached to GameObjects inherit from MonoBehaviour.

public class Player : MonoBehaviour
{
}

Important lifecycle methods:

void Awake() {}
void OnEnable() {}
void Start() {}
void Update() {}
void FixedUpdate() {}
void LateUpdate() {}
void OnDisable() {}
void OnDestroy() {}

Typical uses:

• Awake: early initialization and references
• Start: initialization before the first frame
• Update: frame-based logic and input
• FixedUpdate: physics
• LateUpdate: follow-up logic such as cameras