Guide: Markdown Syntax

# This is a Heading h1

## This is a Heading h2

###### This is a Heading h6

_This text will be italic_  
_This will also be italic_

**This text will be bold**  
**This will also be bold**

_You **can** combine them_

-   Item 1
-   Item 2
    -   Item 2a
    -   Item 2b

1. Item 1
1. Item 2
1. Item 3
    1. Item 3a
    1. Item 3b

![This is a alt text.](https://samplelib.com/lib/preview/png/sample-boat-400x300.png "This is a sample image.")

You may be using [Markdown Live Preview](https://markdownlivepreview.com/).

> Markdown is a lightweight markup language with plain-text-formatting syntax, created in 2004 by John Gruber with Aaron Swartz.
>
> > Markdown is often used to format readme files, for writing messages in online discussion forums, and to create rich text using a plain text editor.

| Left columns | Right columns |
| ------------ | :-----------: |
| left foo     |   right foo   |
| left bar     |   right bar   |
| left baz     |   right baz   |

\```javascript
let message = 'Hello world';
alert(message);
\```

This web site is using `Python-Markdown/markdown`.