Building a Custom Inspector | Editor Scripting | C# | Unity Game Engine

PlayerScript.cs

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using UnityEngine;   public class PlayerScript : MonoBehaviour {     public int health = 100;     public int maxHealth = 100; }

PlayerScriptEditor.cs

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using UnityEngine; using UnityEditor;   [CustomEditor(typeof(PlayerScript))] public class PlayerScriptEditor : Editor {     public override void OnInspectorGUI()     {         PlayerScript playerScript = (PlayerScript)target;         playerScript.health = EditorGUILayout.IntField("Health", playerScript.health);         playerScript.maxHealth = EditorGUILayout.IntField("Max-Health", playerScript.maxHealth);           EditorGUILayout.Space();         EditorGUILayout.BeginHorizontal("box");         if (playerScript.maxHealth > 0)         {             EditorGUILayout.LabelField("Health %", playerScript.health * 100 / playerScript.maxHealth + "%");         }         EditorGUILayout.EndHorizontal();     } }