AngularJS Controllers control the data of an AngularJS application.

AngularJS controllers are regular JavaScript objects.

AngularJS controller syntax

AngularJS applications are controlled by controllers.

ng-controller directive defines the application controller.

Controllers are JavaScript objects created by standard JavaScript object constructors.

AngularJS controller example

<!DOCTYPE html>
<html>
<meta charset="utf-8">
<script src="https://cdn.bootcss.com/angular.js/1.4.6/angular.min.js"></script>

<body>

<div ng-app="myApp" ng-controller="myCtrl">

名:  <input type="text" ng-model="firstName"><br>
姓:  <input type="text" ng-model="lastName"><br>
<br>
姓名: {{firstName + " " + lastName}}

</div>

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

</body>
</html>

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