Following are the 3 core directives of AngularJS.

1. ng-app : This directive defines and links an AngularJS application to HTML.


2. ng-model : This directive binds the values of AngularJS application data to HTML input controls.


3. ng-bind : This directive binds the AngularJS Application data to HTML tags.

These are the advantages of AngularJS:

• AngularJS provides capability to form Single Page Application in a very clean and maintainable method.


• AngularJS provides data binding capability to HTML therefore giving user a rich and responsive experience.


• AngularJS code is unit testable.


• AngularJS uses dependency injection and build use of separation of concerns.


• AngularJS provides reusable components.


• AngularJS helps developer to writes less code and gets more functionality.


• AngularJS, views are pure HTML pages, and controllers written in JavaScript do the business process.


• AngularJS applications will run on all major browsers and good phones together with android and iOS based mostly phones/tablets.

Templates are the rendered view with information from the controller and model. These can be a single file like index.html or multiple views in one page using "partials".

Data binding is an automatic synchronization of data between model and view components. ng-model directive is used in Data binding.

AngularJS is a framework to build the large scale and high performance web application while keeping them as easy-to-maintain. These are the features of AngularJS framework.

AngularJS is a powerful Script based on JavaScript development framework to Implement RICH Internet Application (RIA).

AngularJS is a developers options to write client side application (using JavaScript) in a clean MVC (Model View Controller) side.

Application are written in AngularJS is also cross-browser compliant. AngularJS automatically handles JavaScript code suitable for any browser.

AngularJS is an open source, completely free, and used by large number of developers around the world. It is licensed under the Apache License version 2.0.

Buffer class could be a global class and may be accessed in application without importing buffer module. A Buffercould be a quite an array of integers and corresponds to a raw memory allocation outside the V8 heap. A Buffer can not be resized.

Read - Reads users input, parse the input into JavaScript data-structure and stores in memory

Eval - Evaluates the data structure

Print - Prints the result

Loop - Loops the above command until user press ctrl-c twice