Headers:

H1

H2

H3

H4

H5
H6

Alt-H1

Alt-H2

Text Formatting:

Italics: asterisks or underscores.

Bolds: asterisks or underscores.

Strikethrus: Use two tildes.

Quoted Text

Code & Syntax Highlighting:

Inline code has back-ticks around it.

var s = "JavaScript syntax highlighting";
alert(s);
s = "Python syntax highlighting"
print s
No language indicated, so no syntax highlighting. 
But let's throw in a <b>tag</b>.

Lists:

  1. First ordered list item
  2. Another item
    • Unordered sub-list
  • Unordered list item
  • Another unordered list item
  • A 3rd unordered list item

[ ] task list item (incomplete)

[x] task list item (done)

Links:

I’m an inline-style link

I’m an inline-style link with title

I’m a reference-style link

I’m a relative reference to a repository file

You can use numbers for reference-style link definitions

Or leave it empty and use the link text itself.

URLs and URLs in angle brackets will automatically get turned into links. http://www.example.com or http://www.example.com and sometimes example.com (but not on Github, for example).

Some text to show that the reference links can follow later.

Logos:

Inline-style: alt text

Reference-style: alt text

Tables:

Colons can be used to align columns.

Tables Are Cool
col 3 is right-aligned $1600
col 2 is centered $12
zebra stripes are neat $1

There must be at least 3 dashes separating each header cell. The outer pipes (|) are optional, and you don’t need to make the raw Markdown line up prettily. You can also use inline Markdown.

Markdown Less Pretty
Still renders nicely
1 2 3

Blockquotes:

Blockquotes are very handy in email to emulate reply text. This line is part of the same quote.

Quote break.

This is a very long line that will still be quoted properly when it wraps. Oh boy let’s keep writing to make sure this is long enough to actually wrap for everyone. Oh, you can put Markdown into a blockquote.

Inline HTML:

Definition list
Is something people use sometimes.
Markdown in HTML
Does *not* work **very** well. Use HTML tags.

Horizontal Rules:

Three or more…


Hyphens


Asterisks


Underscores

Line Breaks:

Here’s a line for us to start with.

This line is separated from the one above by two newlines, so it will be a separate paragraph.

This line is also a separate paragraph, but… This line is only separated by a single newline, so it’s a separate line in the same paragraph.

Videos (In this case, Youtube):

They can’t be added directly but you can add an image with a link to the video like this:

IMAGE ALT TEXT HERE

Or, in pure Markdown, but losing the image sizing and border:

IMAGE ALT TEXT HERE