Write Procedure Name correctly formated in algorithm environment

Question

I want to call a function in an algorithm environment.

\documentclass{article}
\usepackage{algorithm}
\usepackage{algpseudocode}

\begin{document}

\begin{algorithm}
\caption{Recursion}

\begin{algorithmic}[1]
\Procedure{Recursion}{$a$}
    \State $a\gets Recursion(a)$ \Comment{Call Recursion again}
    \State \textbf{return} $a$ 
\EndProcedure
\end{algorithmic}
\end{algorithm}

\end{document}

What do I have to do to get the "correct" style for the word "Recursion" in the line \State $r\gets Recursion(a)$?

I tried something like \State $r\gets \Procedure{Recursion}{a}$, but only received errors. The official documentation has no exmple regarding this problem.

What do you mean by "correct"? Small caps? Please explain, what you are having. At the moment you are writing $R\cdot e\cdot c\cdot ... \cdot n(a)$ which happens when writing text like this in math mode. — LaRiFaRi, Jul 07 '14 at 13:54

score 8 · Accepted Answer · edited Jun 10 '22 at 22:58

I don't think that you can print the content of your procedure somewhere else as you have tried by \State $a\gets \Procedure{Recursion}{a}$.

You could do this by styling manually. You may use \textsc in math mode to do so. You can also add a \Comment (see in the example I provided). Instead of \textsc you may also use \Call. Sometimes either \textsc or \Call will not behave as expected.

% arara: pdflatex
\documentclass{article}
\usepackage{algorithm}
\usepackage{algpseudocode}
\begin{document}
\begin{algorithm}
\caption{Recursion}
\begin{algorithmic}[1]
\Procedure{Recursion}{$a$}
    \State $a\gets\Call{Recursion}(a)$ \Comment{Call Recursion again}
    \State \textbf{return} $a$ 
\EndProcedure
\end{algorithmic}
\end{algorithm}
\end{document}

enter image description here

The answer by @Cubic shows how to do it "correctly" – Jochem Kuijpers Aug 30 '18 at 09:56 — Jochem Kuijpers, Aug 30 '18 at 09:56

score 7 · Answer 2 · answered Jan 28 '16 at 14:53

7

The intended way to do this in the algorithmicx package is with the \Call macro, ex:

\begin{algorithm}
\begin{algorithmic}
   \Function{Fix}{f}
      f(\Call{Fix}{f})
   \EndFunction
\end{algorithmic}
\end{algorithm}

answered Jan 28 '16 at 14:53

Cubic

213

score 0 · Answer 3 · answered Jan 02 '22 at 19:47

This worked for me:

\documentclass{article}
\usepackage{algorithm}
\usepackage{algpseudocode}
\begin{document}
\begin{algorithm}
\caption{Recursion}
\begin{algorithmic}[1]
\Procedure{Recursion}{$a$}
    \State $a\gets$ \Call{Recursion}{$a$} \Comment{Call Recursion again}
    \State \textbf{return} $a$ 
\EndProcedure
\end{algorithmic}
\end{algorithm}
\end{document}

Which rendered:

Write Procedure Name correctly formated in algorithm environment

3 Answers3

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