Hypertext Mark-up Language
HTML was invented in 1990 by a scientist Tim Berners-Lee. HTML is the most commonly used language on Web. . Browsers understand only mark-up language. It is a mark-up language, because it contains mark-up tags. It is not a programming language. It is used to write web pages.
Doctype defines the type of web document. It tells the browser which version of HTML you are using. Doctype is always declared before HTML opening tag.For Detail Click Here
In HTML4, Strict type Doctype and transitional doctype both include all attributes and HTML Elements but strict type doctype Doesn’t Include Presentation elements but transitional doctype includes.For Detail Click Here
Block Level Elements are those elements in HTML which always starts and end in a new line. They always took width equal to 100% width of parent element Exp p, h1-h6, div, ul, ol, address etc.For Detail Click Here
All HTML Textual Tags ignore white space and line break. Means text is not formatted. PRE Tag is the only tag which follows the exact format in which you are writing.
It included in HTML-4 Version.
Alt attribute is compulsory in every image tag. It helps google and other search engines to search images. If in any case image fails to upload, alt text holds the space and tell user about image.
There are three types of list:-unordered lists, ordered lists & definition list.For Detail Click Here
HTML forms are used to pass data to the server.For Detail Click Here