comment latex code example

Example 1: latex long comments

\documentclass{article}
\usepackage{verbatim}	%You can use long comments from this package
\begin{document}
    This text will be displayed
\begin{comment}
    This text will not be displayed.
\end{comment}
\end{document}

Example 2: comment in latex

%this is a comment (use percent sign %)

Example 3: latex math comment formula

\documentclass{article}
\usepackage{amsmath}

\begin{document}
\begin{align*}
    3+x &=4 && \text{we are trying to solve for } x\\
    x &=4-3 && \text{Subtract 3 from both sides}\\
    x &=1   && x \text{ must be one}
\end{align*}
\end{document}