moveVelocity does not exist

Following blackthornprod's video on top-down movement,

I inputted code on a file named PlayerController.cs. However, I get an error message saying that the method I used (moveVelocity) doesn't exist:

Assets\Scenes\PlayerController.cs(23,39): error CS0103: The name 'moveVelocity' does not exist in the current context

Here is my code:

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class PlayerController : MonoBehaviour
6. {
7.     public float speed;
8.  
9.     private Rigidbody2D rb;
10.  
11.     void Start()
12.     {
13.         rb = GetComponent<Rigidbody2D>();
14.     }
15.  
16.     void Update()
17.     {
18.         Vector2 moveInput = new Vector2(Input.GetAxis("Horizontal"), Input.GetAxis("Vertical"));
19.     }
20.  
21.     void FixedUpdate()
22.     {
23.         rb.MovePosition(rb.position + moveVelocity * Time.fixedDeltaTime);
24.     }
25. }

 

You haven't declared it, so Unity doesn't know what it is. Write " private Vector2 moveVelocity; " at the top somewhere, maybe underneath your RigidBody2D declaration.