How to load next scene in Unity 5?

So I know how to load a scene based on the name of the scene, however this leads to tedious scripting in my game, so I was wondering if there was a way to load the next level in Unity. Odds are, it requires a little bit of scripting finesse, because there is nothing in the API that does this.

because there is nothing in the API that does this.

Documentation says you can load by sceneIndex. So pass the current sceneIndex plus 1.

 SceneManager.LoadScene(SceneManager.GetActiveScene().buildIndex + 1);

SceneManager.LoadScene

Scene.buildIndex