I just want to know what i did wrong.

Questions & Answers
1

following along with a book and whats supposed to happen is the two variables numbers are supposed to add together when i press return/enter. but nothing is happening can someone tell me what i did wrong?

using UnityEngine;
using System.Collections;

public class LearningScript : MonoBehaviour 
{
	public int balls = 19;
	public int number1 = 9;
	public int number2 = 2;
	// Use this for initialization
	void Start () {
	
		Debug.Log(2 + 9);

		Debug.Log(11 + balls);
	}
	
	// Update is called once per frame
	void Update () {
		if(Input.GetKeyUp(KeyCode.Return))
			AddTwoNumbers();
	
	}
	void AddTwoNumbers()
	{
		Debug.Log (number1 + number2);
	}
}
2

Make sure that the script is attached to a game object in the scene.