<html ng-app>
<head>
<title>Hello World</title>
<script type="text/javascript" src="//ajax.googleapis.com/ajax/libs/angularjs/1.0.7/angular.min.js"></script>
<body>
<input type="text" ng-model="someVariable" />
<h1>Hello {{someVariable}}</h1>
<h4>Uppercase : {{someVariable| uppercase}}</h4>
<h4>Lowercase : {{someVariable| lowercase}}</h4>
</body>
</html>
Output :