how to loop through gameobject in unity code example

Example 1: unity3d loop over all gameobjects

object[] obj = GameObject.FindSceneObjectsOfType(typeof (GameObject));  foreach (object o in obj)  {       GameObject g = (GameObject) o;       Debug.Log(g.name);  }

Example 2: iterate througha game object in unity

for(int i = 0; i < gameobject.transform.GetChildCount(); i++)
{
   Transform Children = gameobject.transform.GetChild(i);
}