LaTeX is the language used in .tex files. It's mostly used to write formal documents such as

  • ๐Ÿ“ Text documents (books, reports, resumes...)
  • ๐Ÿซ Articles/thesis (academic research...)
  • ๐ŸŽ‰ Presentations (slides for programmers...)
  • ...

Where to learn?

Some qualities of LaTeX are

  • ๐ŸŒ Cross-platform
  • ๐Ÿชง Consistency
  • ๐Ÿงฎ Support for math formulas
  • ๐Ÿง‘โ€๐Ÿ’ป Support for code samples

Some ways to write LaTeX:

  • Overleaf: collaborative online tool (account required)
  • CoCalc (๐Ÿ‘ป)

โžก๏ธ LaTeX templates: Overleaf


A basic document looks like this. You can import packages, and you start writing inside the document block.

\documentclass{article} % book...
% import packages (preamble)

% body of the document


\title{A title}
\author{An author}
\date{A date}

Usually before starting the document, we define some metadata. Then, inside the body, we can generate a title page with \maketitle.


You can write text and use these to apply some style:

  • \textbf{word}: bold
  • \underline{word}: underlined
  • \textit{word}: italic
  • \emph{word}: emphasis, almost like italic
  • \vspace{NUMBERmm}: space between paragraphs

โžก๏ธ To force a newline, use \\ (once or twice) or \newline.

โžก๏ธ To center something, use \begin{center}something\end{center}.


  \item an item
  \item an item

Use enumerate for ordered lists, and itemize for unordered lists.

Code in LaTeX

You can use the minted to write code in LaTeX.


You need to define a language, for instance, ocaml.


โžก๏ธ You can write a block of code using this syntax:


โžก๏ธ You can import a file using this syntax:


๐Ÿ‘‰ There is also a package called listings.

Math in LaTeX

Math symbols or formulas can be either inline meaning inside a text, or block-level meaning they will take up a whole line.

  • ๐Ÿ’ฌ inline: $latex$ or \(latex\)
  • ๐Ÿงฎ block: \[latex\] or \begin{equation}latex\end{equation}

๐Ÿ‘‰ Use AtomURL to get the LaTeX code for most mathematical symbols and formulas.

๐Ÿ‘‰ With detexify, draw a symbol and get the LaTeX code.

โžก๏ธ Spaces are merged into one. Use \ to prevent it or use \quad.

โžก๏ธ You can create a horizontal space with \hspace{1cm}.

โžก๏ธ You can use \mathcal{H} for function names/...

โžก๏ธ Use \lfloor/\rfloor and \lceil/\rceil for the rounding symbols (partie entiรจre). Use \lvert/\rvert for absolute values.

๐ŸŒ Use mathjax or katex to render LaTeX formulas in a browser.

๐Ÿ‘ป To-do ๐Ÿ‘ป

Stuff that I found, but never read/used yet.

\verb! http://localhost:3000/!
    \item[$a)$] XXX