Angular Hello World

First angular application

HTML

<div ng-app="" ng-controller="controllerfunction">
    <input type="text" ng-model="firstname">
    <input type="text" ng-model="lastname">
    <p>Firstname : <span ng-bind="firstname"></span>

    </p>
    <p>Lastname :<span ng-bind="lastname"></span>

    </p>
    <p>Full name :<span>{{firstname +" "+lastname}}</span>

    </p>
</div>

JavaScript

function controllerfunction($scope){
debugger;
$scope.firstname="FirstName";
$scope.lastname="LastName";
};