how to fing rigidbody component in unity code example

Example: way do we use a Rigidbody in Get.component();

using UnityEngine; using System.Collections;  public class Test : MonoBehaviour {     private Rigidbody rb;     void Awake(){          rb = gameObject.GetComponent<Rigidbody>();     }       private void Example() {         rb.velocity = some value;     } }