unity how to get specific child object code example

Example 1: 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>();

Example 2: unity get child gameobject

//Instantiate Prefab
GameObject originalGameObject  = Instantiate(prefab);

//To find `child1` which is the first index(0)
GameObject child2 = originalGameObject.transform.GetChild(0).gameObject;

//To find `child2` which is the second index(1)
GameObject child2 = originalGameObject.transform.GetChild(1).gameObject;

//To find `child3` which is the third index(2)
GameObject child3 = originalGameObject.transform.GetChild(2).gameObject;