Enumerate based on session number

Question

I want to use enumerate to number a text as:

\begin{enumerate}
    3.1
    3.2
    3.3
    3.4
\end{enumerate}

\begin{enumerate}
    4.1
    4.2
    4.3
\end{enumerate}

Thank you.

Answer 1

I'm not totally sure that I understood your question correctly, but I think the following should fit your needs.

\documentclass{article}
\usepackage{enumitem}
\newcounter{session}
\newlist{myenumerate}{enumerate}{1}
\setlist[myenumerate]{%
    label=\arabic{session}.\arabic{*},
    before=\stepcounter{session}
}

\begin{document}

First enumeration:
\begin{myenumerate}
    \item
    \item
    \item
    \item
\end{myenumerate}

Second enumeration:
\begin{myenumerate}
    \item
    \item
    \item
\end{myenumerate}

\end{document}