What is the Use of AngularJS Controllers ? | AngularJS Tutorial | AngularJS Interview Question | AngularJS Programmer Guide

AngularJS applications are controlled by controllers. The ng-controller directive defines the controller. The controller code will execute when the page loads.

AngularJS Controller by Example

<div ng-app="" ng-controller="personController">

First Name: <input type="text" ng-model="firstName"><br>
Last Name: <input type="text" ng-model="lastName"><br>
<br>
Full Name: {{firstName + " " + lastName}}

</div>

<script>
function personController($scope) {
    $scope.firstName = "John";
    $scope.lastName = "Doe";
}
</script>