how to find child of other gameobject via script code example

Example 1: find child of gameobject unity

gameObject.transform.Find("ChildGameObject").gameObject;

//This insures that you are finding the child instead of finding another
//GameObject's Child.

Example 2: how to get an child of an gameobject

// By Name
GameObject Child = GameObjectsTransform.Find("NameOfChild").gameObject

// By index
GameObject Child = GameObjectsTransform.GetChild(The child index).gameObject