General rules: never start posts with a header; always include a brief, but clear introduction paragraph to serve as an excerpt; code should only appear later in the code to avoid it appearing in the excerpt.

H1

H2

H3

H4

H5

H6

Alternatively, for H1 and H2, an underline-ish style:

Alt-H1

Alt-H2

Emphasis, aka italics, with asterisks or underscores.

Strong emphasis, aka bold, with asterisks or underscores.

Combined emphasis with asterisks and underscores.

Strikethrough uses two tildes. Scratch this.

1. First ordered list item
2. Another item
   • Unordered sub-list.
3. Actual numbers don’t matter, just that it’s a number
   1. Ordered sub-list

4. And another item.

   You can have properly indented paragraphs within list items. Notice the blank line above, and the leading spaces (at least one, but we’ll use three here to also align the raw Markdown).

   To have a line break without a paragraph, you will need to use two trailing spaces.⋅⋅ Note that this line is separate, but within the same paragraph.⋅⋅ (This is contrary to the typical GFM line break behaviour, where trailing spaces are not required.)

• Unordered list can use asterisks
• Or minuses
• Or pluses

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.

Here’s our logo (hover to see the title text):

Inline-style:

Reference-style:

Inline code has back-ticks around it.

1
2
var s = "JavaScript syntax highlighting";
alert(s);

1
2
s = "Python syntax highlighting"
print s

1
2
No language indicated, so no syntax highlighting.
But let's throw in a <b>tag</b>.

Colons can be used to align columns.

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.

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.

Three or more…

Hyphens

Asterisks

Underscores

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.

Code

Ruby

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
require "gem"

string = "base16"
symbol = :base16
fixnum = 0
float  = 0.00
array  = Array.new
array  = ['chris', 85]
hash   = {"test" => "test"}
regexp = /[abc]/

# This is a comment
class Person

  attr_accessor :name

  def initialize(attributes = {})
    @name = attributes[:name]
  end

  def self.greet
    "hello"
  end
end

person1 = Person.new(:name => "Chris")
print Person::greet, " ", person1.name, "\n"
puts "another #{Person::greet} #{person1.name}"

Java

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
package foo;

import java.util.Iterator;

/**
 * the fibonacci series implemented as an Iterable.
 */
public final class Fibonacci implements Iterable<Integer> {
  /** the next and previous members of the series. */
  private int a = 1, b = 1;

  @Override
  public Iterator<Integer> iterator() {
    return new Iterator<Integer>() {
      /** the series is infinite. */
      public boolean hasNext() { return true; }
      public Integer next() {
        int tmp = a;
        a *= b;
        b = tmp;
        return a;
      }
      public void remove() { throw new UnsupportedOperationException(); }
    };
  }

  /**
   * the n<sup>th</sup> element of the given series.
   * @throws NoSuchElementException if there are less than n elements in the
   *   given Iterable's {@link Iterable#iterator iterator}.
   */
  public static <T>
  T nth(int n, Iterable<T> iterable) {
    Iterator<? extends T> it = iterable.iterator();
    while (--n > 0) {
      it.next();
    }
    return it.next();
  }

  public static void main(String[] args) {
    System.out.print(nth(10, new Fibonacci()));
  }
}