John Gruber 发明

https://github.com/DavidAnson/markdownlint
http://www.cirosantilli.com/markdown-style-guide/
https://www.typora.io/#windows
https://pandao.github.io/editor.md/

basic

需转义的符号: #  *_  +-  .  !  {}  []  ()`

[TOC]
  1. 这是个ordered列表,第1项
    > 引用说明**引用中如果想要换行请使用</br>或者行尾留俩空格**
    >> 2级引用说明
  * 这是个unordered列表,或者使用(+-)
    *    注意:如果该项右下方有文字说明,则*后面最好有4个空格!且文字要空1行前头也留有四个空格!

*emphasize* _....斜体..可换行_
**strong**
***strong&emphasize***
++下划线++  ~~删除线~~  ==加亮==  <mark>加亮</mark>
<sup>上标</sup> <sub>下标</sub> <br>  不通用:^上标^ ~下标~
<span id="jump" style="color:red">..</span>
<abbr title="World Wide Web">www</abbr>

<email@...>
![pic-alt-text](link/to/picture "hover-text")
[hot-link](link/to)
<img src="http://zdabao.com/xx.jpg" style="zoom:20%" />

`brew install ...`

支持的代码类型:
console|bash|cmake|cpp|s(c#/c)|css|dos|go|http|ini|java|javascript|lua|makefile|markdown|nginx|protobuf|python|sql|swift|vim|xml

formula

http://www.mohu.org/info/symbols/symbols.htm

\mathbb  :blackboard bold, 粗体
\mathbf  :boldface, 黑体
\quad    :space
\pm      :plus minus, \mp.
\sum     :求和
\int     :积分
\alpha\beta\gamma\delta\epsilon\zeta
α\alphaβ\betaγ\gamma Γ\Gammaδ\deltaϵ\epsilonζ\zeta
\eta\theta\kappa\lambda\mu\nu
—–—–—–—–—–
η\etaθ\thetaκ\kappaλ\lambda Λ\Lambdaμ\muν\nu
\pi\rho\sigma\tau\phi\omega
—–—–—–—–—–
π\piρ\rhoσ\sigmaτ\tauϕ\phiω\omega
$\{2 + 3^\circ\}(\not\lt \neq \pm \subseteq \notin \emptyset \Rightarrow \longleftarrow \forall \exists \approx \cdots \vec{ab})$
$\Vert{x}\Vert * \mathbb{B} \mathbf{C}$
$\frac{1}{2} \sqrt[3]{2} \lim_{x \to 0}$
$f(x)=\sum_{i=0}^{N} \quad \int_{a}^{b}g(t,i)dt$
# 书写块级公式
符号指示后面要开始对齐,俩\\表换行,[2ex]表多空2个x的高度;
begin{cases}  :大括号分段函数
begin{aligned}:方程组
begin{array}  :数组, c|lr:表示center_align+垂直线+left+right
begin{vmatrix|brace} :矩阵
$$
f(n) =
\begin{cases}
    \frac{n}{2},  & \text{if $n$ is even} \\[2ex]
    3n+1,         & \text{if $n$ is odd}
\end{cases}
$$
$$
  \begin{aligned}
  \dot{x} & = \sigma(y-x) \\
  \dot{y} & = \rho x - y - xz  \\
  \dot{z} & = - \beta z + xy
  \end{aligned}
$$
$$
\begin{array}{c|lcr}
  n & \text{Left} & \text{Center} & \text{Right} \\
  \hline
  1 & 0.24 & 1 & 125 \\
  2 & -1 & 189 & -8 \\
  3 & -20 & 2000 & 1+10i
\end{array}
$$
$$
\begin{vmatrix}
  1 & x & x^2 \\
  1 & y & y^2 \\
  1 & z & z^2 \\
\end{vmatrix}
$$

graph

Alice->Bob: Hello Bob, how are you?
Note right of Bob: Bob thinks
Bob-->Alice: I am good thanks!

flow

start=>start: 开始
isLogin=>condition: 是否已登录?
login=>operation: 登陆
isLoginOK=>condition: 是否成功登录
selectPic=>operation: 选择一张图片
isPic=>condition: 格式是否正确?
doIt=>operation: 完毕资料
isRight=>condition: 资料是否符合要求?
end=>end: 完毕

start->isLogin
isLogin(yes)->selectPic
isLogin(no)->login->selectPic
selectPic->isPic
isPic(yes)->doIt->isRight
isPic(no)->selectPic
isRight(yes)->end
isRight(no)->doIt