Variables Example

Player.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Player : MonoBehaviour
{
    //Value Types
    private int health = 100;
    private float speed = 5.0f;
    public bool isAlive = true;
    
    //Reference Types
    public Transform tran;
    
    private void Start()
    {
        //These variables are directly changed
        health = 0;
        speed = 0f;
        isAlive = false;
        
        //The variables referenced never change but data they hold the location of does
        //The position of transform is never touched but the positon of tran does change from transform since it copied it
        tran = transform;
        tran.positon = new Vector3(1, 1, 1)
        
    }
}