“A single-threaded, non-blocking, asynchronous, concurrent programming language with many flexibilities”. This is how freeCodeCamp defines JavaScript. Sounds great, right? Well, read it again. JavaScript is supposed to be single-threaded and asynchronous simultaneously. Which, when you think about it, sounds like a contradiction.

Data is essential to all JavaScript applications. It determine what we see, hear and interact with when we open the app, and it must be stored properly to guarantee a smooth user experience. Specifically, the data must be a stored in a way that facilitates retrieval, manipulation and is efficient in storage usage. need data to represent information. One of the most important prominent data structures in JavaScript is known as an Array.