HTML5 (No space between "HTML" and "5")is a markup language
used for structuring and presenting content on the World Wide Web.
It is the fifth and current version of the HTML standard.
It was published in 28 October 2014, W3C also published an HTML
5.1 Candidate Recommendation on 21 June 2016. The World Wide Web
Consortium (W3C) to improve the language with support for the latest
multimedia, while keeping it both easily readable by humans and
consistently understood by computers and devices such as web browsers.
HTML5 is intended to subsume not only HTML 4, but also XHTML 1 and
Document Object Model (DOM) Level 2 HTML.
The CSS was started to develop around 1998. And till 2009, it was
under development. The first working draft of CSS3 came in 19-01-2001.
but it was initially declared early in the June 1999. The main difference
between css2 and css3 is Media Queries, Namespaces, Selectors Level 3,
used websites this is client-side script to interact with the user and make
dynamic pages. All modern web browsers on desktops, tablets, and smart phones
Web developers must learn: HTML(Hyper Text Markup Language) to specify the
content of web pages, CSS(Cascading Style Sheets) to specify the presentation
developing responsive, mobile-first web sites. Bootstrap is faster and
easier web development.
Bootstrap includes a responsive, mobile first fluid grid system that
appropriately scales up to 12 columns as the device or viewport size
increases. It includes predefined classes for easy layout options, as
well as powerful mixins for generating more semantic layouts.