I have an attack/take damage script how do I make the player die when health hits 0?

So as my question asked I already have my self a Script to take damage when my AI hits me or collides with me. I don’t want it to go to -10 -20 but when I hit 0 I respawn at a set location

using UnityEngine;
using System.Collections;

public class DamagePlayer : MonoBehaviour
{


	public int playerHealth = 100;
	int damage =10;

	void Start()
	{
		print(playerHealth);
	}


	void OnCollisionEnter(Collision _collision)
	{
		if (_collision.gameObject.tag == "TheOneThatKillsTheLeast")
			playerHealth -=damage;
			print("I have taken damage" + playerHealth);
		}
	}

will I have to link to a new code or is it possible to take damage and kill within this script.
thanks all for the help.

If you want to do it all in the same void in the same script:

void OnCollisionEnter(Collision _collision)
     {
         if (_collision.gameObject.tag == "TheOneThatKillsTheLeast")
             playerHealth -=damage;
             if (playerHealth <= 0){
                 playerHealth = 0;
                 // kill and respawn player here
             }

             print("I have taken damage" + playerHealth);
         }
     }