When you open Unity 3D, you will see a window like this. Under the “Hierarchy” title, a main camera is created as default and you can create your objects in here and see it in “Scene” window. In Scene window, you can move, rotate and resize your objects. When you select an object, its specifications will be shown in “Inspector” window. And if you press play button, your game runs in “Game” window. “Project” window includes all materials of your project such as images, materials, prefabs, scripts etc. You can change layout style by the options at top-left. Are you ready to say “Hello World”?
Click “Create” button under project title and create a C# script. Rename it as “HelloWorld”. Double-click on it and “Mono Develop” will be open as default if you don’t use another compiler. Type
Debug.Log("Hello World");
in Start function and save it. Back to Unity, drag HelloWorld script into the Main camera and press play. You will see our text in “Console” window. Functional scripts should be attached in a game object in scene to be used.