Time：2021-7-29

# Introduction to markdown syntax

Grammar explanation

## bold

**Bold**
__ Bold__

## Italics

*Italics*
_ Italics_

## title

#Primary title#
Primary title
====
##Secondary title##
Secondary title
----
###Tertiary title###
####Four level title####
#####Five level title#####
######Six level title######

## Split line

***
---


## Upper subscript

Superscript x ^ 2^
Lower subscript h ~ 2 ~ 0

## Underline middle dash

++Underline++
~~Middle dash~~

## sign

==Mark==

## Paragraph reference

>Level I
>>Secondary
>>>Tertiary
...

## list

Ordered list
1.
2.
3.
...
Unordered list
-
-
...

-[x] completed task
-[] incomplete task

[link] (www.baidu. Com)
![ Picture description]（ http://www.image.com )

## Code paragraph

\\\ type

Code paragraph

\\\

\Code block\

int main()
{
printf("hello world!");
}


code

## Table

|Title 1 | Title 2 | title 3|
| :--  | :--: | ----: |
|Align left | center | align right|
| ---------------------- | ------------- | ----------------- |
Title 1 Title 2 Title 3
Align left Center Right align
———————- ————- —————–

## Footnotes

hello[^hello]


See footnote at the bottom[1]

## Emoji

Reference website: https://www.webpagefx.com/tools/emoji-cheat-sheet/

:laughing:
:blush:
:smiley:
:)
...


😆😊😃😃

## KAtex \ KAtex KAtex formula

We can render formulas such as Xi + Yi \ = zix\_ i + y\_ i = z\_ And + izi \ = izi \ = izim\_{ i=1}^n a\_ i=0∑i\=1n​ai​\=0
We can also render in a single line

∑i\=1nai\=0\sum\_{i=1}^n a\_i=0 i\=1∑n​ai​\=0

For details, please refer toKAtex documentandKAtex supported functionsas well asLatex document

## layout

::: hljs-left
be at the left side
:::

::: hljs-center
Center
:::

::: hljs-right
be at the right
:::

## definition

Term I

Definition one

Contains_ Inline marker_ Terminology II

Definition II

{some text or code defining two}

Third paragraph of definition II

Term I

: definition I

Term II containing * inline mark *

: definition II

{some text or code defining two}

Third paragraph of definition II

## abbr

The HTML specification is maintained by the W3C

*[HTML]: Hyper Text Markup Language
*[W3C]:  World Wide Web Consortium
The HTML specification is maintained by the W3C

1. A footnote↩︎

1. Upper ^ corner ~ lower mark

## VBS obtains the operating system and its version number

VBS obtains the operating system and its version number ? 1 2 3 4 5 6 7 8 9 10 11 12 ‘************************************** ‘*by r05e ‘* operating system and its version number ‘************************************** strComputer = “.” Set objWMIService = GetObject(“winmgmts:” _  & “{impersonationLevel=impersonate}!\\” & strComputer & “\root\cimv2”) Set colOperatingSystems = objWMIService.ExecQuery _  (“Select * from […]