finding an object within a scene code example

Example 1: unity find object by name

using UnityEngine;
using System.Collections;// This returns the GameObject named Hand in one of the Scenes.public class ExampleClass : MonoBehaviour
{
    public GameObject hand;    void Example()
    {
        // This returns the GameObject named Hand.
        hand = GameObject.Find("Hand");        // This returns the GameObject named Hand.
        // Hand must not have a parent in the Hierarchy view.
        hand = GameObject.Find("/Hand");        // This returns the GameObject named Hand,
        // which is a child of Arm > Monster.
        // Monster must not have a parent in the Hierarchy view.
        hand = GameObject.Find("/Monster/Arm/Hand");        // This returns the GameObject named Hand,
        // which is a child of Arm > Monster.
        hand = GameObject.Find("Monster/Arm/Hand");
    }
}

Example 2: what does gameobject.find return

//It returns null/void