Unity - How to Get Rigidbody From Object a Script Is Applied To

Here’s how to get the rigidbody from an object the script is applied to in Unity. The example shown is in C#.

using UnityEngine;
using System.Collections;
public class PlayerController : MonoBehaviour {
  private Rigidbody rb;
  // Use this for initialization
  void Start () {
    rb = GetComponent ();
  }
  
  // Update is called once per frame
  void Update () {
  }
  // Called before any physics calculations.
  // This is where you put your physics code.
  // We apply forces to the rigid body, which is physics, so this is where it goes.
  void FixedUpdate() {
    // Pressing arrow keys on keyboard will apply force to rigidbody 
    float moveHorizontal = Input.GetAxis ("Horizontal");
    float moveVertical = Input.GetAxis ("Vertical");
    Vector3 movement = new Vector3 (moveHorizontal,0.0f,moveVertical);
    rb.AddForce (movement);
  }
}