Server side JavaScript with Node.js

JavaScript, a programming language is one of the core technologies of the World Wide Web. Over the years, its use has expanded beyond its web browser roots. JavaScript engines, that were originally used only in web browsers, are now considered the core components of some servers in a variety of applications.

Functions in JavaScript provide modularity and reusability of code to the applications developed. They combine many instructions into a single line of code. In this learning sprint, you will learn to declare and use functions in a program.

Modular programming is a software design technique that emphasizes on separating the functionality of a program into independent, interchangeable modules. Each of these modules contain everything necessary to execute only one aspect of the desired functionality.

Asynchronous programming is a technique that enables a program to start a potentially long-running task, and work seamlessly till it has finished. It continues to be responsive to other events even while the task is running.

In any programming language be it Java or C, you need to deal with several file operations, based on the business needs. To perform these operations seamlessly, Node.js provides a specific inbuilt module called the File System Module to help potential developers.

Dealing with errors involves two very different processes; error handling and debugging. Error handling is a combination of coding and methodology that allows your program to anticipate its users and the errors.

Testing is essential to identify mistakes. Testing is important since it discovers defects/bugs before delivery to the client. It guarantees quality of both the service and software. It makes a software more reliable and easy to use.