In unity3d i want to Display a text UI when my mouse Cursor on the cube. but I c

Question

In unity3d i want to Display a text UI when my mouse Cursor on the cube. but I cannot see the text message. could you find why cannot see the text please? I already write mystring part.....

here is my C# Code

using UnityEngine;
using UnityEngine.UI;
using System.Collections;

public class displayUI : MonoBehaviour
{

    public string myString;
    public Text myText;
    public float fadeTime;
    public bool displayInfo;

    // Use this for initialization
    void Start()
    {

        //Screen.lockCursor = false;

        myText = GameObject.Find("Text").GetComponent<Text>();
        myText.color = Color.clear;

    }

    // Update is called once per frame
    void Update()
    {

        FadeText();
        /*
        if(Input.GetKeyDown(KeyCode.Escape))
        {
            Screen.lockCursor = false;
        }*/
    }

    void OnMouseOver()
    {
        displayInfo = true;
    }

    void OnMouseExit()
    {
        displayInfo = false;
    }

    void FadeText()
    {
        if (displayInfo)
        {
            myText.text = myString;
            myText.color = Color.Lerp(myText.color, Color.black, fadeTime * Time.deltaTime);
        }

        else
        {
            myText.color = Color.Lerp(myText.color, Color.clear, fadeTime * Time.deltaTime);
        }
    }
}

Explanation / Answer

check the value in myString

I hope there is the no value myString

It may problem in below code

if (displayInfo)
        {
            myText.text = myString;
            myText.color = Color.Lerp(myText.color, Color.black, fadeTime * Time.deltaTime);
        }

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