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<!DOCTYPE html>
<html lang="en">
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
<body>

<div ng-app="myApp" ng-controller="formCtrl">
  <form>
    First Name: <input type="text" ng-model="firstname">
  </form>
</div>

<script>
var app = angular.module('myApp', []);
app.controller('formCtrl', function($scope) {
    $scope.firstname = "John";
});
</script>

</body>
</html>