How to Create a Simple Alert using AngularJs on Button Click

First create a simple button which contains an ng-click Event:

<input id="btnTest" type="button" value="Show Alert" ng-click="ShowAlert()" />

 var app = angular.module('MyApp', []);

            app.controller('MyController', function ($scope, $window) {

                $scope.ShowAlert = function () {                   

                    $window.alert("Hello World");

                }

            });

From this method it will display the alert box.

Thank you,