Check out example codes for "disable a component unity". It will help you in understanding the concepts better.
Code Example 1
using UnityEngine;
using System.Collections;
public class EnableComponents : MonoBehaviour
{
private Light myLight;
void Start ()
{
myLight = GetComponent<Light>();
}
void Update ()
{
if(Input.GetKeyUp(KeyCode.Space))
{
myLight.enabled = !myLight.enabled;
}
}
}
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