unity how to load everything then load scene code example

Example 1: unity how to load up a scene

SceneManager.LoadScene("scene_01");

Example 2: load scene unity

using UnityEngine.SceneManagement


public class LoadScene : MonoBehavior
{
	public string sceneToLoad = "Level2";
    
    public void Start()
    {
    	SceneManager.LoadScene(sceneToLoad);
    }
}