Hello World Angular JS

HTML

<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.0.6/angular.min.js"></script>
<div ng-app="">
    <div ng-controller="HelloWorldCtrl">
        <p>
            <label>Nome</label>
            <input type="text" ng-model="nome" required/>
        </p>
        <p>
            <label>Número</label>
            <input type="number" ng-model="numero" required/>
        </p>
        <p>Olá {{nome}}</p>
        <p>Olá {{nome | uppercase}} - <em>(filtro uppercase)</em>
        </p>
        <p>{{numero | number:2}} - <em>(filtro number)</em></p>
        </div>
</div>

CSS

.ng-invalid { border: 1px solid red; }

JavaScript

function HelloWorldCtrl($scope) {
    $scope.nome = "mundo";
    $scope.numero = 123;
}