HTML Referance - !


 * The comment tag is used to insert a comment in the source code. A comment will be ignored by the browser. You can use comments to explain your code, which can help you when you edit the source code at a later date.

Note: This tag is used in WikiText.

<!DOCTYPE>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">


 * The doctype declaration should be the very first thing in an HTML document, before the &lt;html&gt; tag.The doctype declaration is not an HTML tag; it is an instruction to the web browser about what version of the markup language the page is written in.