Notas por profesionales HTML5 (Ingles)

Creating a simple page
The following HTML example creates a simple “Hello World” web page.
HTML files can be created using any text editor. The files must be saved with a .html or .htm[2] extension in order
to be recognized as HTML files.
Once created, this file can be opened in any web browser.

<!DOCTYPE html>
<html lang=”en”>
<meta charset=”UTF-8″>
<h1>Hello World!</h1>
<p>This is a simple paragraph.</p>