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I'm making a Beamer presentation and I need space, so I want to hide the inputs and outputs and instead only show my algorithm. But when I simply don't write the input keyword, then the line numbers suddenly disappear:

\documentclass{article}
\usepackage{algorithm2e}
\begin{document}
\begin{algorithm}[H]
    \DontPrintSemicolon
    \LinesNumbered
    \SetKwInOut{Input}{Input} 
    \Input{} % can't omit this, else line numbers don't work ...
    line 1\;
    line 2\;
    line 3\;
    line 4\;
    line 5\;
\end{algorithm}
\end{document}

With \Input:

enter image description here

Without it:

enter image description here

Note: in beamer directly the bug is weirder, as line number show, but are shifted vertically:

enter image description here

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1 Answer 1

Reset to default
1

If you add linesnumbered as an option to algorithm2e, it will work.

\documentclass{article}
\usepackage[linesnumbered]{algorithm2e}
\begin{document}
\begin{algorithm}[H]
    \DontPrintSemicolon
    line 1\;
    line 2\;
    line 3\;
    line 4\;
    line 5\;
\end{algorithm}
\end{document}

enter image description here

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2
  • Interesting and weird that the global setting behaves differently than the per algorithm \LinesNumbered, but it works. Thank you. I guess you could do that and then where necessary use \LinesNotNumbered. Commented Jan 24, 2018 at 19:39
  • I am not very familiar with the algorithm2e package, but I guess you can use \LinesNotNumbered with the desired result. I don't see clearly why the local setting doesn't work while the global does. Commented Jan 24, 2018 at 19:41

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