how to get parent transform in unity code example

Example 1: transform object according to its parent unity

transform.localPosition = new Vector3(12.5f, 12.5f, 12.5f);

Example 2: c# unity parent object

using UnityEngine;
using System.Collections;public class ExampleClass : MonoBehaviour
{
    public GameObject player;    //Invoked when a button is pressed.
    public void SetParent(GameObject newParent)
    {
        //Makes the GameObject "newParent" the parent of the GameObject "player".
        player.transform.parent = newParent.transform;        //Display the parent's name in the console.
        Debug.Log("Player's Parent: " + player.transform.parent.name);        // Check if the new parent has a parent GameObject.
        if (newParent.transform.parent != null)
        {
            //Display the name of the grand parent of the player.
            Debug.Log("Player's Grand parent: " + player.transform.parent.parent.name);
        }
    }    public void DetachFromParent()
    {
        // Detaches the transform from its parent.
        transform.parent = null;
    }
}

Example 3: how to parent something unity

public GameObject GameObjectYouWantToParent;
public GameObject TheNewParent;

Transform GameObjectsTransform = GameObjectYouWantToParent.transform;
GameObjectsTransform.parent = TheNewParent;

Example 4: how to get parent gameobject in unity

childObject.transform.parent.gameObject