Markdown

Markdown is a plain text markup language intended to be rendered as a web page. Variants and extensions exist.

The Markdown markup at a glance:

# Heading
## Heading
### Heading
...
###### Heading

Alternative heading markup
==========================

Alternative heading markup
--------------------------

Paragraph text spanning two lines, featuring
_italics_, __boldface__, `code`, and a [hyperlink](http://en.wikibooks.org/). Also possible are *italics* and **boldface**, and as an extension, ~~strikethrough~~.

Bulleted list:
  * item 1
  * item 2
  * item 3

Numbered list:
  1. item 1
  2. item 2
  3. item 3

----

The above is a horizontal rule. Let me quote:
> This is formatted
> as a block quote.

External links

• Markdown Syntax Documentation by John Gruber, daringfireball.net
• Markdown Cheatsheet by Adam Pritchard, github.com
• Markdown help, stackoverflow.com
• rfc7763 - The text/markdown Media Type, tools.ietf.org
• rfc7764 - Guidance on Markdown and text/markdown, tools.ietf.org
• CommonMark specification, spec.commonmark.org
• Online Markdown Editor, dillinger.io
• StackEdit In-browser Markdown editor, stackedit.io
• Markdown Mode for Emacs, jblevins.org
• W:Markdown