Markdown -- basic usage syntax

  Put the following code in md Preview the effect

# RUNOB Markdown Test
## Hello World!
### RUNOB Markdown  
11
* Italics *
** bold **
********************************
~~ Delete ~~
<u> Underline </u> 
12323[^ Important text ]
+  The first one is 
+  The second item 
1. 123
    - 123 //  Empty four spaces 
      $\color{#FF0000}{ red }$ 

      $\color{#FFFF00}{ yellow }$ 
      $\color{#00FF00}{ green }$  
      $\color{#0000FF}{ blue }$ 
      $\color{#00FFFF}{ Indigo }$ 
      $\color{#FF00FF}{ purple }$ 
      <font face=" Microsoft YaHei " size = 7 color = red > **MarkDown** </font>
      == Mark ==

>  block 
>  block 
>  block 

> Outermost layer 
>>  first floor 
>>>  The third level 
---
> Block list 

```javascript
var result =12;
```
```ts
    let num:number = 123;
```
```javascript
$(document).ready(function() {
    alert(result);
})

```

<!--  link  -->
 This is a link  [ Nanchen Web](https://blog.csdn.net/nanchen_J?type=blog)  
 Direct import URL <https://blog.csdn.net/nanchen_J?type=blog>
***
<!--  picture  -->
![ Icon ](https://profile-avatar.csdnimg.cn/2ebc999b3755463d879d90ec437ee306_nanchen_j.jpg!1)
<!--  form  -->
|   Header   |   Header   |
|  :----  | ----  |
| Cell | Cell two |
| Cell | Cell two |

1. -:  Set the right alignment of content and title bar .
2. :-  Set the content and title bar to the left .
3. :-:  Set the content to center with the title bar .

[ expression ](https://www.webfx.com/tools/emoji-cheat-sheet/)
[:emojisense Plugin Download ](https://marketplace.visualstudio.com/items?itemName=bierner.emojisense)
 Shortcut key  ctrl+i

Here is the effect ：