First post on this blog.

Katex

Inline: $ Hello \enspace World! $

Outline:

$$ Hello \enspace World! $$

Mermaid

    flowchart TD
    A@{ shape: stadium, label: "Start" }
    A --> B@{ shape: lean-r, label: "print \"Hello World!\"" }
    B --> C@{ shape: stadium, label: "Exit" }