Unity - class LoadScene

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

public class LoadScene : MonoBehaviour
{

    public void loadScenePerID(int sceneID)
    {
        SceneManager.LoadScene(sceneID);
    }

    public void loadScenePerName(string sceneName)
    {
        SceneManager.LoadScene(sceneName);
    }

    public void quitGame()
    {
        Application.Quit();
    }
}