I keep getting compiler errors even though my script has no errors?

Questions & Answers
1

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PlayerController : MonoBehaviour {

public float movespeed;
public float jumpforce;

private Rigidbody2D myRigidbody;

private Collider2D myCollider;

public bool grounded;
public LayerMask whatIsGround;

// Use this for initialization
void Start () {
	myRigidbody = GetComponent<Rigidbody2D > ();

	myCollider = GetComponent<Collider2D> ();
}

// Update is called once per frame
void Update () {

	grounded = Physics2D.IsTouchingLayers (myCollider,whatIsGround);

	myRigidbody.velocity = new Vector2(movespeed,myRigidbody.velocity.y);

	if(Input.GetKeyDown(KeyCode.Space) || Input.GetMouseButtonDown(0) )
	{
	    if (grounded) 
		{
		    myRigidbody.velocity = new Vector2 (myRigidbody.velocity.x, jumpforce);
	    }
}

}

3

#Class brace is missing in your code.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PlayerController : MonoBehaviour
{

    public float movespeed;
    public float jumpforce;
    private Rigidbody2D myRigidbody;
    private Collider2D myCollider;
    public bool grounded;
    public LayerMask whatIsGround;
    // Use this for initialization
    void Start()
    {
        myRigidbody = GetComponent<Rigidbody2D>();
        myCollider = GetComponent<Collider2D>();
    }

    // Update is called once per frame
    void Update()
    {
        grounded = Physics2D.IsTouchingLayers(myCollider, whatIsGround);
        myRigidbody.velocity = new Vector2(movespeed, myRigidbody.velocity.y);
        if (Input.GetKeyDown(KeyCode.Space) || Input.GetMouseButtonDown(0))
        {
            if (grounded)
            {
                myRigidbody.velocity = new Vector2(myRigidbody.velocity.x, jumpforce);
            }
        }
    }
}
2

check that your script has the same class as the file that you are putting on the object