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enter image description here

How can I obtain this vertical line?

Zarko
  • 296,517
Ravinala
  • 41
  • 1
    Welcome to TeX:SE! Please show us in form of complete, compilable small document, what you try so far. Seems that use tcolorbox can be a way to solve your problem. – Zarko Nov 17 '22 at 12:32
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    Can you rewrite your title to be more descriptive than "I want something like this"? Also, provide more context; Should there be multiple of these structures following one another? Should it be allowed to break at the page boundary? – Werner Nov 17 '22 at 18:09

1 Answers1

2

Try this:

\documentclass[10pt,a4paper]{article}
\usepackage{framed,lipsum}

\begin{document}
    \lipsum[1]
    \begin{leftbar}
        \noindent
        \lipsum[2]
    \end{leftbar}
\lipsum[3]
\end{document}

Output:

enter image description here

Second solution:

\documentclass[10pt,a4paper]{article}
\usepackage{framed,lipsum}

\begin{document}
\lipsum[1]
\begin{tabular}{|lp{10cm}}
\textit{Proof}:& \lipsum[1]\
& \lipsum[5]
\end{tabular}
\end{document}

Output:

enter image description here

Raffaele Santoro
  • 9,702
  • Thank you for this reply. A question the lp 10 cm represent the length of the vertical lign. How should i know exactly the size of it? – Ravinala Nov 17 '22 at 20:53
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    @Ravinata No, 10 cm is the width of text for proof, You can change this value as You need, also to reach the width of Your page . Length of the vertical line is equal to the length of Your proof. – Raffaele Santoro Nov 17 '22 at 22:35
  • Simple and effective ! – Black Mild Aug 15 '23 at 01:13