Heading level 1

Heading level 2

Heading level 3

Here is some inline code, <div></div>, between 2 backticks.

// This is a codeblock:

function square(number) {
  return number * number;
}

You can also make text bold...
Or italic1 or italic2.
Or a bold italic text like so: both!
You can cross text in markdown, crossing stuff out.

There's also links MDN Documentation,
and Block Quotes:

It does not matter how slowly you go as long as you do not stop.
by Confucius

And you can make tables in markdown too:

ID	Language	Description
#1	JavaScript	It is a programming language
#2	Markdown	It is a markup language, useful for taking notes
#3	CSS	It is the styling language that makes the web pretty and sexy
#4	HTML	A markup language that provides the fundamental structure for a page

This is a list in markdown:

• List item
• List item
  • Indented list item
  • Indented list item
• List item

1. And there are numbered lists too.
2. Item 2
3. Item 3:

You can embed images as well: