Unity3D Script Execution & Compilation Order

In Unity3D, the order of script execution and compilation is as follows:

1. Compilation order:
2. After writing or modifying scripts within the Unity editor, Unity will automatically detect the changes made to the script and recompile them. Compilation is done on-demand, only scripts that have been modified will be recompiled.
3. Unity will compile all script files first and then package them into a single assembly that contains the compiled results of all script files.
4. The order of script execution:
5. The execution order of scripts in Unity is determined by the order in which they are attached to GameObjects. When a script is attached to a GameObject, Unity will execute the methods such as Update, FixedUpdate, and LateUpdate in the order in which the scripts are attached.
6. If multiple scripts are attached to the same GameObject, their execution order will depend on the order they are listed in the Inspector panel. You can adjust the script execution order by clicking on the “Edit” -> “Project Settings” -> “Script Execution Order” option in the menu bar.