get component gameobject unity code example

Example 1: unity create gameobject with component

GameObject go = new GameObject("Test", typeof(MeshRenderer), typeof(MeshFilter), typeof(YourScript));

Example 2: unity gameobject.getcomponent

rb = GetComponent<Rigidbody>();

Example 3: findobject getcomponent

GameObject.Find("Name of the object you want to access").GetComponent<Name of the Component (Transform,Script,RigidBody,etc..)();
     
     An Example (easy to understand):
     
     GameObject Player = GameObject.Find("Player");
     PlayerController PlayerControllerScript = Player.GetComponent<PlayerController>();
     PlayerControllerScript.run = true;
     
     Another Example:
     
     GameObject.Find("Player").GetComponent<PlayerController>().run = true;