<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf 8">
<title>Guru99</title>
</head>
<body ng-app="app">
<h1 ng-controller="HelloWorldCtrl">{{message}}</h1>
<script src="https://code.angularjs.org/1.6.9/angular.js"></script>
<script src="app.js"></script>
</body>
</html>