Edit in JSFiddle

angular.module('myapp', []).controller('HomeController', ['$scope', function($scope) {
    $scope.age = '';
    $scope.name = '';
}]);

<div ng-app="myapp">
    <div ng-controller="HomeController">
        <div>Name: <input type="text" ng-model="name" name="name" /></div>
        <div>Age: <input type="text" ng-model="age" name="age" /></div>
        <div>Hello, {{name}} {{age}}!</div>
    </div>
</div>