Markdown

Headings

# Heading 1—Largest heading (H1)

## Heading 2—Section heading (H2)

### Heading 3—Subsection heading (H3)

#### Heading 4—Sub-subsection (H4)

##### Heading 5—Minor heading (H5)

###### Heading 6—Smallest heading (H6)

Text Formatting

**bold**—Bold text

*italic*—Italic text

***bold italic***—Bold and italic

~~strikethrough~~—Strikethrough text

`inline code`—Inline code

> blockquote—Quoted text

>> nested quote—Nested blockquote

---—Horizontal rule

Lists

- item / * item—Unordered list

1. item—Ordered list

- nested item—Nested list (2 spaces)

- [x] checked—Task list (checked)

- [ ] unchecked—Task list (unchecked)

1. First\n 1. Sub-item—Nested numbered list

Links & Images

[text](url)—Inline link

[text](url "title")—Link with title tooltip

![alt](image.png)—Image

[ref]: url—Reference-style link

<https://example.com>—Auto-linked URL

[text][ref]—Use reference link

[![alt](img)](url)—Clickable image link

Code Blocks

```language—Fenced code block start

```—Fenced code block end

indented line—Indented code block (4 sp)

```js—JavaScript syntax highlight

```python—Python syntax highlight

```diff—Diff syntax highlight

Tables

| H1 | H2 |—Table header row

|---|---|—Header separator (required)

| cell | cell |—Table data row

|:---|—Left-aligned column

|:---:|—Center-aligned column

|---:|—Right-aligned column

GitHub Flavored Markdown

```mermaid—Mermaid diagrams

```math—Math (LaTeX) block

$E=mc^2$—Inline math

:emoji_name:—GitHub emoji shortcode

@username—Mention a user

#123—Link to issue/PR number

<details><summary>—Collapsible section (HTML)

footnote[^1]—Footnote reference

Escape & Misc

\* \_ \#—Escape special characters

 —Non-breaking space (HTML)

<br>—Line break (HTML)

Two trailing spaces—Line break (soft)

—HTML comment (hidden)

^superscript^—Superscript (some flavors)

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