Write a program for to bootstrap process in Angular

program for to bootstrap process in Angular is:

<html>
    <body ng-app="TestApp">
        <div ng-controller="Ctrl">Hi{{msg}}!</div>
        <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.7.8/angular.min.js"> 
</script>
        <script>
            var test = angular.module('TestApp', []);
            test.controller('Ctrl', function($scope) {
                $scope.msg = 'Good Morning';
            });
        </script>
    </body>
</html>