JQuery is a JavaScript library. It is the most popular JavaScript library. JQuery is free, open source software, dual-licensed under the MIT License and the GNU General Public License. JQuery’s syntax is designed to make it easier to navigate a document, select DOM elements, creation of animations, communications to server requests, event handling and develop Ajax applications. JQuery is a development tool which allows for easier, faster JavaScript development. JQuery also provides capabilities for developers to create plug-ins on top of the JavaScript library.
JQuery is rich library of functions and methods which does the same task like JavaScript but the difference is that JQuery is easy to use and give much flexibility to the developers. It can be used with PHP, asp, jsp, servlets, CGI and almost all the programming languages. Anyone can use simple JavaScript to perform all the functions that JQuery provides.