How to change the text inside UI>Text

I want to show player points in a Text box. How can i make that using a script? I put the default text as “0” and i want to change it to “1”,“2”,…“n”. I tryied this:

public class SomeClass : MonoBehaviour
 {
   Text myText;
 
   public void Start()
   {
     myText = GetComponent<Text>();
   }
 
   public void UpdateText()
   {
     mytext.text = "Some new string value";
   }
 }

but I get this error: The type or namespace name `Text’ could not be found. I am using the latest version of Unity

With using UnityEngine.UI;

using UnityEngine;
using UnityEngine.UI;

public class SomeClass : MonoBehaviour
{
	Text myText;
	
	public void Start()
	{
		myText = GetComponent<Text>();
	}
	
	public void UpdateText()
	{
		myText.text = "Some new string value";
	}
}