1

I am writing a LaTeX document for some pseudo code I have written. I have a bunch of while loops, but the way latex is formatting them, it looks like:

while(x)
   while(y)
      while(z)

whereas I want it to do:

while(x)
   while(y)
while(z)

so I tried using \endwhile, and got the following error:

Undefined control sequence.
l.44    \ENDWHILE

I am using 

\usepackage{algorithm}
\usepackage{program}

after using wikibooks - Algorithms & Pseudocode site, in which they use \endwhile, so I am wondering what I am doing wrong.

Werner
  • 603,163
Jim
  • 121

2 Answers2

1

In case anyone else runs into this problem, it turns out that you need to have while-do statements

while{x} \DO
 a,b,c = z
 while{z} \DO
  z = 1 \OD
\OD
while{y} \DO
 y += 1 \OD

That seemed to fix the indentation problem for me.

Jim
  • 121
1

Uhm, you actually only need one of those packages. Pick either one, and it should work.

Example for algorithmic:

\documentclass{article}

\usepackage{algorithmic}

\begin{document}
  \begin{algorithmic}
  \WHILE{condition}
    \WHILE{condition}
      \STATE\COMMENT{do something}
    \ENDWHILE
  \ENDWHILE
  \WHILE{condition}
    \STATE\COMMENT{do something else}
  \ENDWHILE
  \end{algorithmic}
\end{document}

Example for program:

\documentclass{article}

\usepackage{program}

\begin{document}
  \begin{program} 
  \WHILE condition \DO 
    \WHILE condition \DO 
      \COMMENT{do something}
    \OD
  \OD
  \WHILE condition \DO 
    \COMMENT{do something else}
  \OD
  \end{program}
\end{document}
pulsar
  • 126
  • Ah, that uses algorithmic, not algorithm... Now it is working. I definately like algorithmic more than program, so thank you. I was going off of that website. –  Aug 24 '11 at 20:47
  • Oops, my bad. I misread that in your post, sorry. algorithm only adds the float environments, so with algorithm and algorithmic you should be fine: \begin{algorithm}\begin{algorithmic}...\end{algorithmic}\end{algorithm} – pulsar Aug 24 '11 at 20:58