HTML & CSS
What is use of css, Please explainn
CSS or Cascading Style Sheet is used to style the HTML for your website, take this site for instance. Without the stylesheet used to position elements and colorize the text all you would see is a page of just black text and images (if any)
This is the latest in a regular series of "What's this?" posts. SitePoint forums exist to help coders, designers, developers, and others with a variety of skill levels learn new techniques, solve problems, and discuss issues arising from design and development. There are a number of entry-level tutorials on the Internet that one can use to learn the basics of HTML and CSS. This is one of them.