Bug Jump script

Im new to unity and c# trying to add jumping and i think im so close but i keep getting the error

NullRefrenceException: Object refrence not set to an instance of a object

im not sure whats wrong because i think everything is right

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5.  
6.  
7. public class Jumps : MonoBehaviour
8. {
9.  
10.     Rigidbody2D rb;
11.  
12.     public float JumpForce = 10f;
13.     void Jump()
14.     {
15.         rb.velocity = Vector2.up * JumpForce;
16.     }
17.  
18.     // Update is called once per frame
19.     void Update()
20.     {
21.         if(Input.GetKeyDown(KeyCode.Space))
22.         {
23.             Jump();
24.         }
25.     }
26.    
27.  
28. }
29.  

 

You never assign anything to your Rigidbody2D; it doesn't magically get a reference to the object's rigidbody.

You'll want to get a reference to it, either by making it public and assigning the reference in the inspector, or finding it with GetComponent<T> on start.

Code (CSharp):

1. private void Start()
2. {
3.     rb = GetComponent<Rigidbody2D>();
4. }

 

Thanks, got it working now