Which method would be used to update game logic on every frame in Unity?

The method used to update game logic on every frame in Unity is Update(). This method is called once per frame, making it ideal for most game-related tasks that need to happen frequently, such as handling player input, moving objects, or checking for game events. Since the game frame rate can vary, Update() allows you to maintain smooth gameplay by ensuring that logic runs in sync with the rendering of frames.

This method is recommended for operations that need to respond to user inputs or continuously change in response to the game's state over time. For example, if you want to move a character based on keyboard input, placing that code in Update() ensures it runs as often as frames are rendered, resulting in responsive controls.

Other methods like FixedUpdate() and LateUpdate() serve different purposes; FixedUpdate() is used for physics calculations at consistent intervals, while LateUpdate() is often used for logic that depends on calculations made in update before rendering happens. OnGUI() is primarily for rendering immediate mode GUI elements and is called multiple times per frame rather than being tied to frame rate, making it less suitable for general game logic updates.