difference b/w HTML and HTML5??

Answer 1

HTML5 is the latest update which includes a lot of new additions.
For more: Check this out: http://stackoverflow.com/questions/134727/whats-the-key-difference-between-html-4-and-html-5

Answer 2

HTML5 is a newer version of XHTML . It has lots of new tags and attributes then previous HTML. and now its lot more easier to write.