Application.Quit

static function Quit () : void

Description

Quits the player application. Quit is ignored in the editor or the web player.

IMPORTANT: In most cases termination of application under iOS should be left at the user discretion. Consult Apple's Technical Q&A qa1561 page for further details: http://developer.apple.com/iphone/library/qa/qa2008/qa1561.html

JavaScript

// Quits the player when the user hits escape
function Update () {
    if (Input.GetKey ("escape")) {
        Application.Quit();
    }
}

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    void Update() {
        if (Input.GetKey("escape"))
            Application.Quit();
        
    }
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

    def Update():
        if Input.GetKey('escape'):
            Application.Quit()