MD.txt

**Comandos MarkDown**

1) Headers

# This is a Heading h1
## This is a Heading h2
###### This is a Heading h6


2) 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_


3) 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


4) Images

![][This is an alt text.](/image/sample.webp "This is a sample image.")



5) Links

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



6) Blockquotes

> 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.



7) Tables

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



8) Blocks of code

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


9) Inline code

This web site is using `markedjs/marked`.


10) Superscripts and Subscripts

Superscript: X<sub>2</sub>，Subscript: O<sup>2</sup>


11) Abbreviation(link HTML abbr tag)

The <abbr title="Hyper Text Markup Language">HTML</abbr> specification is maintained by the <abbr title="World Wide Web Consortium">W3C</abbr>.


12) GFM task list

- [x] GFM task list 1
- [x] GFM task list 2
- [ ] GFM task list 3
    - [ ] GFM task list 3-1


13) FlowChart

```flow
st=>start: Login 
op=>operation: Login operation
cond=>condition: Successful Yes or No?
e=>end: To admin

st->op->cond
cond(yes)->e
cond(no)->op
```

14) Sequence Diagram

```seq
Andrew->China: Says Hello 
Note right of China: China thinks\nabout it