HiLaTex

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% Used to set properties (global settings) and define some custom commands
\documentclass{article} % Document type; the formatting will vary based on the document type, e.g., article, book, letter, etc.

%---------- Title Section ------------
\title{\LaTeX Introduction}
\author{Raffe Yang}
\date{\today} % \today will automatically sync to today's date

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% A .tex file has exactly one document section
\begin{document}
    \maketitle % Actually outputs the title section
    
    Hi \LaTeX
    % An empty line in the document indicates a line break
    
    % $inline formula$    $$display formula$$
    Let $f(x)$ be defined by the formula $$f(x)=2\sin x$$ which is a polynomial of degree 2.
    
\end{document}