What is the purpose of the $scope variable in AngularJS?

AngularJS is a powerful JavaScript framework that is commonly used to build web applications. One of the most important concepts in AngularJS is the $scope variable.

The $scope variable is essentially the glue between the controller and the view in an AngularJS application. It is a JavaScript object that contains the model data that is being used by the view. When you define a variable on the $scope object in the controller, you are essentially making that variable available to the view.

For example, let’s say you have a controller that looks like this:

    var myApp = angular.module('myApp', []);

    myApp.controller('myController', function($scope) {
        $scope.message = "Hello, World!";
    });
    

In this controller, we have defined a variable called “message” on the $scope object. This variable is now accessible in the view and can be displayed using AngularJS’s data binding syntax.

Here is an example of how you would display the “message” variable in the view:

    

        
{{ message }}
    
    

When this code is run, the string “Hello, World!” will be displayed on the screen.

The $scope variable is essential for creating dynamic web applications in AngularJS. It is the key mechanism for passing data between the controller and the view, and allows for two-way data binding that makes AngularJS such a powerful framework.