octogem/Assets/Scripts/Components/UnitHealth.cs

using UnityEngine;

public class UnitHealth : MonoBehaviour
{
    public int currentHealth;
    public int maximumHealth = 10;
     
    void Awake()
    {
        currentHealth = maximumHealth;
    }

    public void Damage(int amount)
    {
        //Negative damage doesn't exist
        if(amount <= 0)
        {
            return;
        }
        //Damage the unit
        currentHealth -= amount;
        //Do not go beyond zero
        if(currentHealth < 0)
        {
            currentHealth = 0;
        }
    }

    public void Heal(int amount)
    {
        currentHealth += amount;
        //Positive healing
        if (amount >= 0)
        {
            if(currentHealth > maximumHealth)
            {
                currentHealth = maximumHealth;
            }
        }
        //Negative healing: non-lethal!
        else
        {
            //Prevent lethal damage
            if(currentHealth <= 0)
            {
                currentHealth = 1;
            }
        }
    }
}