+++
title = "Markdown examples"
date = 2023-01-31
updated = 2023-04-28
description = "This post showcases some examples of Markdown formatting, including a table, code blocks and tags, quotes, tables, and footnotes."
[taxonomies]
tags = ["markdown", "showcase"]
[extra]
katex = true
+++
## $\KaTeX$
[$\KaTeX$ ](https://katex.org/ ) is a fast and easy-to-use library that enables the rendering of mathematical notation, using LaTeX syntax.
You can use $\KaTeX$ **inline** by wrapping the expression between `$` or between `\\(` and `\\)` .
For example, `$ \sin(x) = \sum_{n=0}^{\infty} \frac{(-1)^n}{(2n + 1)!} x^{2n + 1} $` would render: $ \sin(x) = \sum_{n=0}^{\infty} \frac{(-1)^n}{(2n + 1)!} x^{2n + 1} $
To display the expression **on its own line and centered** , wrap it around `$$` or between `\\[` and `\\]` .
For example, `\\[ r = \frac{\sum_{i=1}^{n}(x_i - \bar{x})(y_i - \bar{y})}{\sqrt{\sum_{i=1}^{n}(x_i - \bar{x})^2}\sqrt{\sum_{i=1}^{n}(y_i - \bar{y})^2}} \\]` renders: \\[ r = \frac{\sum_{i=1}^{n}(x_i - \bar{x})(y_i - \bar{y})}{\sqrt{\sum_{i=1}^{n}(x_i - \bar{x})^2}\sqrt{\sum_{i=1}^{n}(y_i - \bar{y})^2}} \\]
To activate $\KaTeX$ for a post, include `katex = true` within the `[extra]` section of the post's front matter. For enhanced performance and security, the JavaScript, CSS, and fonts are hosted locally.
**Note**: After enabling $\KaTeX$, if you want to use \$ without rendering a mathematical expression, escape it with a single backslash: `\$` .
## Table
Here's an example of a table[^1]. Its colours change depending on the current theme.
| Symbol | Element | Atomic Number |
|---------|---------|---------------|
| H | Hydrogen| 1 |
| C | Carbon | 6 |
| Fe | Iron | 26 |
| Au | Gold | 79 |
## Code Block
```rust
fn main() {
println!("Hello, world!") -> ();
}
```
## Code tags
Lorem ipsum `dolor` sit amet, `consectetur adipiscing` elit.
`Lorem ipsum dolor sit amet, consectetur adipiscing elit.`
## Quote
> We're all hurtling towards death. Yet here we are, for the moment, alive. Each of us knowing we're going to die. Each of us secretly believing we won't.
>
> — Charlie Kaufman, Synecdoche, New York
[^1]: And here's an example of a footnote!
