get component of child object in unity 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: Unity find component from child object

//Returns the component of Type type in the GameObject or 
//any of its children using depth first search.

//A component is returned only if it is found on an active GameObject.

Transform transform = GetComponentInChildren<Transform>();