Error: CS1061 from the 'Roll-A-Ball' tutorial

I’m very new to Unity and C# and am completely unaware how to fix this compiler error
Any help would be greatly appreciated

using UnityEngine;
using System.Collections;

public class PlayerController : MonoBehaviour {
void Fixedupdate ()
float moveHorizontal = Input.GetAxis(“Horizontal”);
float moveVertical = Input.GetAxis(“Vertical”);

    Vector3 movement = new Vector3(moveHorizontal, 0.0f, moveVertical);


This error means that you’re trying to access a class member which doesn’t exist. In your code, error is a result of calling Addforce on a rigidbody - there is no such method. But there is a AddForce method. Character casing in member names and in variable names is important.

Another problem in your script is Fixedupdate which should be changed to FixedUpdate. This mistake won’t cause any compilation error, but in the current form your script won’t work, because this method will never be called by Unity.