Carbon Add Hours In Laravel

<?php
  
namespace App\Http\Controllers;
  
use Illuminate\Http\Request;
use Carbon\Carbon;
  
class DateController extends Controller
{
    public function index()
    {
        $currentDateTime = Carbon::now();
        $newDateTime = Carbon::now()->addHour();
             
        print_r($currentDateTime);
        print_r($newDateTime);
    }
}