HyperText Markup Language (HTML), Cascading Style Sheets (CSS), and JavaScript are the languages that run the web. They’re very closely related, but they’re also designed for very specific tasks. Understanding how they interact will go a long way towards becoming a web developer.
JavaScript is a lightweight, interpreted programming language. It is designed for creating network-centric applications. It is complementary to and integrated with Java. JavaScript is very easy to implement because it is integrated with HTML. It is open and cross-platform.
Javascript is a MUST for students and working professionals to become great Software Engineers especially when they are working in Web Development Domain.