Edit in JSFiddle

<body ng-app="firstModule" >
<div ng-controller="simpleController">
<strong>First name:</strong> {{firstName}}<br />
<strong>Last name:</strong> {{lastName}}</span><br />
<strong>Full name:</strong> {{getFullName()}}<br />
<label>Set First name: <input type="text" ng-model="firstName"/></label><br />
<label>Set Last name: <input type="text" ng-model="lastName"/></label>
</div>
</body>