I keep getting a bar and 0 at the end of the nested forall loop I write within a Pseudocode

Question

\documentclass{article}
\usepackage{algorithm}
\usepackage{algorithmic}
\begin{document}
\begin{minipage}{0.46\textwidth}
\begin{algorithm}[H]
\caption{foo}
\begin{algorithmic}[1]
\STATE let $S$ represent ..
\STATE let $P$ represent ..
\STATE let $N$ represent ..
\FORALL {$p \gets Rand(0,P) $}
\FORALL{$i \gets Rand(0,n)$} 
\STATE Select $j \gets Rand(0,n)$ \\
$S[p,j], S[p,i] \gets S[p,i], S[p,j]$
\ENDFOR
\ENDFOR
\end{algorithmic}
\end{algorithm}
\end{minipage}
\end{document}

Please provide more information about your desired output, and please, please provide a "Minimal Working Example" (MWE) that starts with \documentclass, includes all relevant \usepackage commands, ends with \end{document} and compiles without errors, even if it does not produce your desired output. — Sandy G, Mar 23 '22 at 17:35
That's probably =0 at the end, which points to you mixing the use of algorithmic (from the algorithms bundle) and algorithmic (from algorithmicx). See Algoritmic return command = 0. — Werner, Mar 23 '22 at 20:47
the problem appeared to be that the \algpseudocode package was loaded and it was causing the code to return a zero at the end regardless. — Su__, Mar 23 '22 at 21:17

score 1 · Answer 1 · answered Mar 23 '22 at 15:29

This answer assumes you use the combination of the algorithm and algorithmic packages (this information was not provided in the question).

The syntax for \FORALL is that the definition of the loop variable is in brackets but the loop body is not in brackets. The body is assumed to be everything until the corresponding \ENDFOR statement.

MWE:

\documentclass{article}
\usepackage{algorithm}
\usepackage{algorithmic}
\begin{document}
\begin{minipage}{0.66\textwidth}
\begin{algorithm}[H]
\caption{foo}
\begin{algorithmic}[1]
\STATE let $S$ represent ..
\STATE let $P$ represent ..
\STATE let $N$ represent ..
\FORALL{$p \gets Rand(0,P) $}
\FORALL{$i \gets Rand(0,n)$} 
\STATE Select $j \gets Rand(0,n)$ \\
$S[p,j], S[p,i] \gets S[p,i], S[p,j]$
\ENDFOR
\ENDFOR
\end{algorithmic}
\end{algorithm}
\end{minipage}
\end{document}

Result:

I keep getting a bar and 0 at the end of the nested forall loop I write within a Pseudocode

1 Answers1