如何在 multicol 环境中在两个特定列之间画一条垂直线

Question

尝试在多列环境中在第 4 列和第 5 列之间添加一条垂直线。

\documentclass[a4paper,10pt]{article}
\usepackage[utf8]{inputenc}
\usepackage{multicol}
\usepackage{lipsum}
%opening


\begin{document}

\begin{multicols}{5}

\lipsum
%... line_beween_forth_and_fith_column
\end{multicols}


\end{document}

Answer 1

\documentclass[a4paper,10pt]{article}
\usepackage[utf8]{inputenc}
\usepackage{multicol}
\usepackage{lipsum}
%opening

\makeatletter
\setlength\columnseprule{.5pt}

\def\columnseprulecolor\vrule\@width{%
\ifnum\count@=\numexpr\mult@rightbox+8\relax
\vrule\@width
\else
\kern
\fi
}
\makeatother

\begin{document}

\begin{multicols}{5}

\lipsum
%... line_beween_forth_and_fith_column
\end{multicols}


\end{document}