what is GetComponent in unity code example

Example 1: how to get component in unity c#

GetComponent<Rigidbody>(); //used to find component on character (rigid body can be changed)
GameObject.FindGameObjectWithTag("player"); //finds any game object in the scene with this tag

Example 2: unity get component

public GameObject Var; //only if the component you want is on a different gameObject

void Start(){
	Var.GetComponent<Component>(); //just GetComponent<Component>(); if the component you want is on the same object as script
}