Help! Script won't work.

Hey guys. This is probably a dumb question but I can’t figure out what did I do wrong.
Here’s the script:

using UnityEngine;
using System.Collections;
using System;

public class Test : MonoBehaviour {

	// Use this for initialization
	void Start () {
		print ("Start");
	// Update is called once per frame
	void Update () {
			print ("Update");

When I put this script on any gameObject of the scene, nothing happen. I don’t know why and what is wrong in it.
Can you help me?
Thanks guys!

UPDATE: Ok, nevermind, I was just dumb and wasn’t looking in the right console…
Thanks for your help guys

Try GetKey up or down instead of GetKey