get gameobject name in the hierarchy code example

Example 1: unity find game object by name

//tag
foreach(GameObject fooObj in GameObject.FindGameObjectsWithTag("foo"))
{
    if(fooObj.name == "bar")
    {
        //Do Something
    }
}
//isim
foreach (var obje in FindObjectsOfType(typeof(GameObject)) as GameObject[])
{
    if(obje.name == "obje")
    {
        //Do something...
    }
}

Example 2: what does gameobject.find return

//It returns null/void