Markdown is a lightweight and easy-to-use syntax for styling all forms of writing on the GitHub platform.

What you will learn:

How the Markdown format makes styled collaborative editing easy
How Markdown differs from traditional formatting approaches
How to use Markdown to format text
How to leverage GitHub’s automatic Markdown rendering
How to apply GitHub’s unique Markdown extensions

What is Markdown?
Markdown is a way to style text on the web. You control the display of the document; formatting words as bold or italic, adding images, and creating lists are just a few of the things we can do with Markdown. Mostly, Markdown is just regular text with a few non-alphabetic characters thrown in, like # or *.

You can use Markdown most places around GitHub:

Gists
Comments in Issues and Pull Requests
Files with the .md or .markdown extension
For more information, see “Writing on GitHub” in the GitHub Help.

Examples
Text Lists Images Headers & Quotes Code Extras
It's very easy to make some words bold and other words italic with Markdown. You can even link to Google!
It's very easy to make some words bold and other words italic with Markdown. You can even link to Google!

Syntax guide
Here’s an overview of Markdown syntax that you can use anywhere on GitHub.com or in your own text files.

Headers

This is an

tag

This is an

tag

This is an

tag

Emphasis
This text will be italic
This will also be italic

This text will be bold
This will also be bold

You can combine them
Lists
Unordered

• Item 1
• Item 2
  • Item 2a
  • Item 2b
    Ordered

1. Item 1
2. Item 2
3. Item 3
   1. Item 3a
   2. Item 3b
      Images
      
      Format:
      Links
      http://github.com - automatic!
      GitHub
      Blockquotes
      As Kanye West said:

We're living the future so
the present is our past.
Inline code
I think you should use an
<addr> element here instead.

GitHub Flavored Markdown
GitHub.com uses its own version of the Markdown syntax that provides an additional set of useful features, many of which make it easier to work with content on GitHub.com.

Note that some features of GitHub Flavored Markdown are only available in the descriptions and comments of Issues and Pull Requests. These include @mentions as well as references to SHA-1 hashes, Issues, and Pull Requests. Task Lists are also available in Gist comments and in Gist Markdown files.

Syntax highlighting
Here’s an example of how you can use syntax highlighting with GitHub Flavored Markdown:

function fancyAlert(arg) {
  if(arg) {
    $.facebox({div:'#foo'})
  }
}

You can also simply indent your code by four spaces:

function fancyAlert(arg) {
  if(arg) {
    $.facebox({div:'#foo'})
  }
}

Here’s an example of Python code without syntax highlighting:

def foo():
if not bar:
return True
Task Lists

• [x] @mentions, #refs, links, formatting, and tags supported
• [x] list syntax required (any unordered or ordered list supported)
• [x] this is a complete item
• [ ] this is an incomplete item
  If you include a task list in the first comment of an Issue, you will get a handy progress indicator in your issue list. It also works in Pull Requests!

Tables
You can create tables by assembling a list of words and dividing them with hyphens - (for the first row), and then separating each column with a pipe |:

First Header	Second Header
Content from cell 1	Content from cell 2
Content in the first column	Content in the second column

Would become:

First Header Second Header
Content from cell 1 Content from cell 2
Content in the first column Content in the second column
SHA references
Any reference to a commit’s SHA-1 hash will be automatically converted into a link to that commit on GitHub.

16c999e8c71134401a78d4d46435517b2271d6ac
mojombo@16c999e8c71134401a78d4d46435517b2271d6ac
mojombo/github-flavored-markdown@16c999e8c71134401a78d4d46435517b2271d6ac
Issue references within a repository
Any number that refers to an Issue or Pull Request will be automatically converted into a link.

#1
mojombo#1
mojombo/github-flavored-markdown#1
Username @mentions
Typing an @ symbol, followed by a username, will notify that person to come and view the comment. This is called an “@mention”, because you’re mentioning the individual. You can also @mention teams within an organization.

Automatic linking for URLs
Any URL (like http://www.github.com/) will be automatically converted into a clickable link.

Strikethrough
Any word wrapped with two tildes (like this) will appear crossed out.

Emoji
GitHub supports emoji! :sparkles: :camel: :boom:

To see a list of every image we support, check out the Emoji Cheat Sheet.