Check out example codes for "unity3d get component". It will help you in understanding the concepts better.
Code Example 1
using UnityEngine;
public class GetComponentExample : MonoBehaviour
{
void Start()
{
HingeJoint hinge = gameObject.GetComponent(typeof(HingeJoint)) as HingeJoint; if (hinge != null)
hinge.useSpring = false;
}
}
Learn ReactJs, React Native from akashmittal.com