# My(change me!)
###### tags: `Tag(change me!)`
> This note is yours, feel free to play around. :video_game:
> Type on the left :arrow_left: and see the rendered result on the right. :arrow_right:
## :memo: Where do I start?
### Step 1: Change the title and add a tag
- [ ] Create my first HackMD note (this one!)
- [x] Change its title
- [x] Add a tag
- [x] 456
- [x] 123
- [x] ddd
### Step 2: Write something in Markdown
Let's try it out!
Apply different styling to this paragraph:
**HackMD gets everyone on the same page with Markdown.** ==Real-time collaborate on any documentation in markdown.== Capture fleeting ideas and formalize tribal knowledge.
- [x] **Bold**
- [x] *Italic*
- [ ] Super^script^
- [ ] Sub~script~
- [ ] ~~Crossed~~
- [x] ==Highlight==
- [ ] ~~1231213~~
==12~34~561^65^1==
:::info
:bulb: **Hint:** You can also apply styling from the toolbar at the top :arrow_upper_left: of the editing area.

:::
> Drag-n-drop image from your file system to the editor to paste it!
### Step 3: Invite your team to collaborate!
Click on the <i class="fa fa-share-alt"></i> **Sharing** menu :arrow_upper_right: and invite your team to collaborate on this note!

- [ ] Register and sign-in to HackMD (to use advanced features :tada: )
- [ ] Set Permalink for this note
- [ ] Copy and share the link with your team
:::info
:pushpin: Want to learn more? ➜ [HackMD Tutorials](https://hackmd.io/c/tutorials)
:::
[:link:][AA8-787]
[AA8-787]: https://hackmd.io/c/tutorials/%2Fs%2Flink-with-github
## BONUS: More cool ways to HackMD!
- Table
| Features | Tutorials |
| ----------------- |:----------------------- |
| GitHub Sync | [:link:][GitHub-Sync] |
| Browser Extension | [:link:][HackMD-it] |
| Book Mode | [:link:][Book-mode] |
| Slide Mode | [:link:][Slide-mode] |
| Share & Publish | [:link:][Share-Publish] |
[GitHub-Sync]: https://hackmd.io/c/tutorials/%2Fs%2Flink-with-github
[HackMD-it]: https://hackmd.io/c/tutorials/%2Fs%2Fhackmd-it
[Book-mode]: https://hackmd.io/c/tutorials/%2Fs%2Fhow-to-create-book
[Slide-mode]: https://hackmd.io/c/tutorials/%2Fs%2Fhow-to-create-slide-deck
[Share-Publish]: https://hackmd.io/c/tutorials/%2Fs%2Fhow-to-publish-note
[Share-Publish22]: https://www.gss.com.tw/blog/%E7%8E%A9%E8%BD%89-
```php=
echo 123;
foreach($v as $i){
$a ++;
}
```
```sql=
select 1 from 2 where 1 =1;
```
js-sequence-diagrams
https://bramp.github.io/js-sequence-diagrams/
```sequence
AA->BB:
BB->CC:
CC->DD:
DD-->BB: 456
AA->>CC: 123
DD-->>EE:
```
flowchart.js
http://flowchart.js.org/
```flow
st=>start: Start|past:>http://www.google.com[blank]
e=>end: End|future:>http://www.google.com
op1=>operation: My Operation|past
op2=>operation: Stuff|current
sub1=>subroutine: My Subroutine|invalid
cond=>condition: Yes
or No?|approved:>http://www.google.com
c2=>condition: Good idea|rejected
io=>inputoutput: catch something...|future
st->op1(right)->cond
cond(yes, right)->c2
cond(no)->sub1(left)->op1
c2(yes)->io->e
c2(no)->op2->e
```
```flow
st=>start: Start:>http://www.google.com[blank]
e=>end:>http://www.google.com
op1=>operation: My Operation
sub1=>subroutine: My Subroutine
cond=>condition: Yes
or No?:>http://www.google.com
io=>inputoutput: catch something...
para=>parallel: parallel tasks
st->op1->cond
cond(yes)->io->e
cond(no)->para
para(path1, bottom)->sub1(right)->op1
para(path2, top)->op1
```
https://www.tonyballantyne.com/graphs.html
```graphql=
rankdir=LR; //Rank Direction Left to Right
a -- b;
b -- c;
b -- d;
d -- a;
```
- LaTeX for formulas
$$
x = {-b \pm \sqrt{b^2-4ac} \over 2a}
$$
- Code block with color and line numbers:
```javascript=16
var s = "JavaScript syntax highlighting";
alert(s);
```
- UML diagrams
```sequence
Alice->Bob: Hello Bob, how are you?
Note right of Bob: Bob thinks
Bob-->Alice: I am good thanks!
Note left of Alice: Alice responds
Alice->Bob: Where have you been?
```
- Auto-generated Table of Content
[ToC]
> Leave in-line comments! [color=#3b75c6]
- Embed YouTube Videos
{%youtube PJuNmlE74BQ %}
> Put your cursor right behind an empty bracket {} :arrow_left: and see all your choices.
- And MORE ➜ [HackMD Tutorials](https://hackmd.io/c/tutorials)
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