how can i destroy the object when life get 0?,how can i destroy a object when life get 0?

 using UnityEngine;
 using System.Collections;
 
 public class PlayerHealth : MonoBehaviour {
     public int maxHealth = 100;
     public int curHealth = 100;
     
     public float healthBarLength;
 
     void Start () {
 
     healthBarLength = Screen.width / 2;
     }
     
 
     void Update () {
     AddjustCurrentHealth(0);
         
     }
     
     
     void OnGUI(){
     GUI.Box(new Rect(10, 10, healthBarLength, 20), curHealth + "/" + maxHealth);    
     }
     
    
     public void AddjustCurrentHealth(int adj) {
       curHealth += adj;    
         
         if(curHealth < 0)
             curHealth = 0;
         
     
         
         if(curHealth > maxHealth)
             curHealth = maxHealth;
         
         if(maxHealth < 1)
             maxHealth = 1;
         
         healthBarLength = (Screen.width / 2) * (curHealth / (float)maxHealth);
     }
 }