Checking What The Current Level Is

Unity Engine
1

Is there a way to check what level the player is currently playing?

Something like,

if (current level == Level 1) {
  NextLevel = Level 2;
}

if (GUI.Button (Rect (30, 50, 30, 14),"Next Level")) {
  Application.LoadLevel(NextLevel);
}
2

You can use Application.loadedLevel to get the index of the last loaded level, or Application.loadedLevelName to get the name of the last loaded level.