# Hello, World!


Sample post for testing purposes.

**Bold text**  
_Italic text_  
~~Strikethrough text~~  
`Inline code`  
[example.com](https://example.com)

> Done is better than perfect.

## List

- unordered list item 1
- unordered list item 2
  - unordered list item 2.1
  - unordered list item 2.2

1. ordered list item 1
2. ordered list item 2
   1. ordered list item 2.1
   2. ordered list item 2.2

## Code

Inline code: `print("Hello, World!")`

```python
def hello_world():
    print("Hello, World!")
```

```rust
fn main() {
    println!("Hello, World!");
}
```

```javascript
const helloWorld = () => {
  console.log("Hello, World!");
};
```

## Math

Inline math: $e^{i\pi} + 1 = 0$

Block math:

$$
\forall \epsilon > 0, \exists \delta > 0
~~\mathrm{s.t.}~~
0 < |x - a| < \delta \implies |f(x) - b| < \epsilon
$$

## Image

![alt text](./icon.webp)

`![alt text](./icon.webp)`:

<img src="./icon.webp" alt="alt text" width="200" />

`<img src="./icon.webp" alt="alt text" width="200" />`:

## Heading 2

### Heading 3

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