Application.levelCount
static var levelCount: int;
static int levelCount;
static levelCount as int
Description

The total number of levels available (Read Only).

	// Loads a random level

Application.LoadLevel (Random.Range(0, Application.levelCount-1));
using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    void Example() {
        Application.LoadLevel(Random.Range(0, Application.levelCount - 1));
    }
}
import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	def Example() as void:
		Application.LoadLevel(Random.Range(0, (Application.levelCount - 1)))