How do I add a blank line in the algorithmic environment?

Question

I'm trying to learn the algorithmic package for typesetting pseudocode. One problem I'm running into is that I can't figure out how to insert blank lines, to separate blocks of code. The usual \\ or starting a new paragraph doesn't seem to work. How can I insert blank lines in in the algorithmic environment?

score 39 · Accepted Answer · answered Sep 20 '11 at 15:39

39

If you want the empty line to be numbered, just insert

\STATE

on this line.

If you want an unnumbered empty line, insert

\item[]

instead.

answered Sep 20 '11 at 15:39

Andrey Vihrov

22,325

But the lefthand label number increments by 1 as usual. Any way to introduce a new line WITHOUT incrementing the number? – Sibbs Gambling Sep 09 '13 at 10:11
1

I recommend the package algorithmicx which provides a set of macros to extend package algorithmic and is more customizable than the latter). Using algorithmicx, a blank line can be produced by \State (numbered) or \Statex (unnumbered). – hengxin Oct 15 '13 at 03:01
1

When I add \STATE or \item[] before a \COMMENT line, then it doesn't work. I need to add it twice in order to see the same effect. – Agostino May 22 '15 at 00:47

score 6 · Answer 2 · answered Apr 29 '18 at 17:32

6

just add

\texttt{\\}

it always works for me!!

answered Apr 29 '18 at 17:32

Joseph

161

score 2 · Answer 3 · answered Sep 19 '11 at 05:46

2

It’s a kludge, but you might be able to use

\renewcommand{\algorithmiccomment}[1]{}
\begin{algorithmic}
    \STATE $x \leftarrow 1$
    \COMMENT{}
    \STATE $x \leftarrow 2$
\end{algorithmic}

answered Sep 19 '11 at 05:46

bdesham

193

This didn't work in an algorithmic environment for me. – metakermit Jul 23 '13 at 22:51
Thanks. I added \[\] to algorithm and the line now is unnumbered. – Avv Apr 05 '21 at 21:41

score 2 · Answer 4 · answered Sep 25 '19 at 07:26

2

Just use \[\] instead of \\. Math formula is not numbered as a single line in algorithmicx.

answered Sep 25 '19 at 07:26

Tyler Liu

21

What is the reason behind that? Why this would unnumber a line? – Avv Apr 05 '21 at 21:40
Thank you. \begin{algorithm}\end{algorithm}. I tried that on algorithm and it works! – Avv Apr 05 '21 at 21:41

How do I add a blank line in the algorithmic environment?

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