// Draws a text field and when it gets modified prints a message
var stringToEdit : String = "Modify me.";

function OnGUI () {
// Make a text field that modifies stringToEdit.
stringToEdit = GUI.TextField (Rect (10, 10, 200, 20), stringToEdit, 25);
if (GUI.changed)
Debug.Log("Text field has changed.");
}

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
public string stringToEdit = "Modify me.";
void OnGUI() {
stringToEdit = GUI.TextField(new Rect(10, 10, 200, 20), stringToEdit, 25);
if (GUI.changed)
Debug.Log("Text field has changed.");

}
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

public stringToEdit as string = 'Modify me.'

def OnGUI():
stringToEdit = GUI.TextField(Rect(10, 10, 200, 20), stringToEdit, 25)
if GUI.changed:
Debug.Log('Text field has changed.')