# Header 1
## Header 2

And so on up to 6.

Return once starts a new line.
Return twice (blank line) starts a new paragraph.

*Italics*
**Bold**
~~Strikethrough~~

- bullet a
- bullet b
  - nested

1. first
2. second

[link text](https://example.com)

Inline `code` and a fenced block:

```js
const hi = "world";
```

> A blockquote.
> Spans multiple lines.

| col a | col b |
| ----- | ----- |
| 1     | 2     |
| 3     | 4     |

Horizontal rule:

---

![alt](https://placehold.co/120x60)