UI Text in C#

Guys, I'm having huge issues with adding GUI text into the screen. Yes I know that I can simple Create new -> UI -> Text. But how do I change the text using a C# script? I have a score that has to be updated, but I dont know which function to call. If I try to google I only find old versions of doing this in JS and they no longer work. How to do it in Unity 5.0.1 using C#?

Help please!

 

1) Create a public or (private + serializable flag) variable in your component code "public Text scoreText". Drag a reference in hierarchy to link these components. Then use scoreText.text in your code. Hope this helps

 

How do I use it?
It gives me an error.
c:\Users\Aleksei\Dropbox\purpura_draco\Assets\Script\gemCounter.cs(15,15): Error CS0029: Cannot implicitly convert type 'string' to 'UnityEngine.UI.Text' (CS0029) (Assembly-CSharp)

 

code

Code (csharp):

1.  
2. using UnityEngine;
3. using System.Collections;
4. using UnityEngine.UI;
5.  
6. public class gemCounter : MonoBehaviour {
7.     Player p;
8.     //UnityEngine.UI.Text text;
9.     public Text scoreText;
10.  
11.     // Use this for initialization
12.     void Start () {
13.         p = GameObject.FindGameObjectWithTag ("Player").GetComponent<Player> ();
14.    
15.    
16.     }
17.    
18.     // Update is called once per frame
19.     void Update () {
20.  
21.         scoreText = "test";
22.    
23.     }
24. }
25.  

 

It's confusing but the Text component object has a string variable named 'text' that you have to access. So instead of scoreText = "test"; you would have to do scoreText.text = "test";