Health script not working, why?

Questions & Answers
1

I have enemyDamage defined in another script so why wont this work? Help please!

using UnityEngine;
using System.Collections;

public class PlayerHealth : MonoBehaviour {

	public int playerHealth = 100;
	bool dead = false;


	void OnColliderHit() 
	{
		if (gamobjectWithTag ("Enemy")) 
		{
			playerHealth - enemyDamage;

		}
	}
	void Update()
	{
		if (playerHealth <= 0)
			dead == true;
		if(dead == true)
		{
			Application.LoadLevel(Application.LoadedLevel);
		}
	}
}
2

public class PlayerHealth : MonoBehaviour {

    public int playerHealth = 100;
    bool dead = false;
 
 
    void OnCollisionEnter(Collider other) 
    {
       if (other.gameObject.tag == "Enemy") 
       {
         enemyDamage = other.getComponentInChildren<EnemyScript>().damage;
         playerHealth = playerHealth - enemyDamage;
 
       }
    }
    void Update()
    {
       if(playerHealth <= 0){
         dead = true;
         Application.LoadLevel(Application.LoadedLevel);
       }
    }
}

Then to all Enemy’s you attach a script like

public class EnemyScript : MonoBehavior{
   public int damage = 10;
}

Try to analyze the code, there are several mistakes you made, but this way it should work.