Markdown Syntax Summary

Basic Syntax

1. Headings

Use the # symbol to denote headings. The number of # symbols determines the heading level.

# Heading Level 1
## Heading Level 2
### Heading Level 3
#### Heading Level 4
##### Heading Level 5
...

2. Paragraphs and Line Breaks

Paragraphs should be separated by a blank line. Adding two spaces at the end of a line creates a line break.

This is the first line.  
This is the second line.

3. Emphasis (Bold, Italic, Strikethrough)

*Italic* or _Italic_
**Bold** or __Bold__
***Bold Italic*** or ___Bold Italic___
~~Strikethrough~~

4. Lists

Unordered lists use -, +, or *
Ordered lists use numbers followed by .

- Unordered item 1
- Unordered item 2

1. Ordered item 1
2. Ordered item 2

5. Links and Images

[Hyperlink](https://example.com)

![Image](https://example.com/image.png)

6. Code Blocks

`Inline code`

    ```Code block (enclosed by three backticks)
    Multiline code
    ...
    ```

7. Blockquotes

> This is a blockquote.

2. Advanced Syntax

1. Tables

| Header 1 | Header 2 |
| -------- | -------- |
| Cell 1   | Cell 2   |
| Cell 3   | Cell 4   |

2. Task Lists

- [x] Completed item
- [ ] Incomplete item

3. HTML Support

Markdown supports certain HTML elements.

<p style="color:red">This is a red text.</p>

3. Common Syntax Reference Table

Syntax Type	Markdown Syntax
Heading	`# Heading Level 1` `## Heading Level 2`
Bold	`Bold`
Italic	`Italic`
Strikethrough	`~~Strikethrough~~`
Hyperlink	`[Description](URL)`
Image	`![Description](URL)`
Unordered List	`- Item` or `* Item`
Ordered List	`1. Item`
Code Block	\`Inline code\` or \`\`\`Code block\`\`\`
Task List	`- [x] Completed` `- [ ] Incomplete`

The syntax above covers the officially supported Markdown features. Mastering these will be sufficient for most documentation needs.

References:
https://www.markdownguide.org/basic-syntax/
https://www.markdownguide.org/extended-syntax/
https://www.markdownguide.org/cheat-sheet/
https://markdown.com.cn/basic-syntax/
https://markdown.com.cn/extended-syntax/