How can i fix this script? C#

I put in this script but the console continues to give me these four errors

  1. Assets/ReturnMenu.cs(7,10): error
    CS1519: Unexpected symbol `if’ in
    class, struct, or interface member
    declaration
  2. Assets/ReturnMenu.cs(7,10): error
    CS1519: Unexpected symbol `(’ in
    class, struct, or interface member
    declaration
  3. Assets/ReturnMenu.cs(7,10): error
    CS1519: Unexpected symbol `)’ in
    class, struct, or interface member
    declaration
  4. Assets/ReturnMenu.cs(7,10): error
    CS1519: Unexpected symbol `(’ in
    class, struct, or interface member
    declaration

If anyone can help please do so! Heres the script:

using UnityEngine;
using System.Collections;

public class ReturnMenu : MonoBehaviour
	void Update()
{
	if(Input.GetKeyDown(KeyCode.Escape))
		Application.LoadLevel(0);
	
}

You are missing the curly braces block for the class.

using UnityEngine;
using System.Collections;
 
public class ReturnMenu : MonoBehaviour
{
    void Update()
    {
        if(Input.GetKeyDown(KeyCode.Escape))
             Application.LoadLevel(0);
    }
}