Problem with unity Ui Text and how to change it

i am trying to create a Button that when pressed makes a number (displayed in text format) increas. t$$anonymous$$s is my script but i cant get it to work

using System.Collections; using System.Collections.Generic; using UnityEngine; using UnityEngine.UI; public class TextChanger : MonoBehaviour { private int value; private string numbertext; public Text number_text; // Use t$$anonymous$$s for initialization void Start() { } // Update is called once per frame void Update() { OnClickChangeValue on = new OnClickChangeValue(); value = on.number; number_text.text = "text";