Are AngularJs controllers singletons ?

AngularJs code-sample

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

app.controller('singletonTest', function ($scope, singletonService) {

    $scope.name = singletonService.getValue();

});

app.service('singletonService', function () {

    var field = {

        value: 'hello Anil'

    };

    var getValue = function () {

        return val;

    }

    return {

        getValue: getValue

    };

});

HTML code

<div ng-app="singletonApp">

    <div ng-controller="singletonTest">

            <input type="text" ng-model="name.value" />

    </div>

</div>

For more, go to link
http://blog.jdriven.com/2013/03/how-to-create-singleton-angularjs-services-in-4-different-ways/