# \begin{algorithm} unrecognized

I have used these two packages for creating algorithm

\usepackage{algorithm2e}
\usepackage{algorithmicx}


But \begin{algorithm} shows as unrecognized command. Even \For, \While are shown as unrecognized. I don't understand. I'm using TexStudio as editor. Here is a sample code

\documentclass[12pt,a4paper,oneside,oldfontcommands]{memoir}
\usepackage{algorithm2e}
\usepackage{algorithmicx}
\begin{document}
\begin{algorithm}
\caption{Retiming Algorithm to compute Shortest Path}
Set count = 1 \linebreak
\While{count $\le$ V}{
Set W(U,V) = $\infty$ \linebreak
Set D(U,V) = -1 \linebreak
count $\gets$ count + 1
}

\end{algorithm}
\end{document}


If I run above code, I get no errors but \While, \begin{algorithm} are coming as unrecognized commands. I'm not good at LaTeX. I've used google as source to write this.

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TeXStudio is irrelevant in this context (editors usually are). Please provide a full minimal example, i.e., something that we can copy'n'paste to our own systems without having to add anything. You do not provide any information about which document class your are using. –  daleif Jun 16 '14 at 10:10
Please check now –  user2940249 Jun 16 '14 at 11:09
No problems here. Which LaTeX installation are you using? –  daleif Jun 16 '14 at 11:36
I'm using TexStudio. even i've no errors but that shows as unrecognized command in the editor. –  user2940249 Jun 16 '14 at 13:56
What do you mean by unrecognized in the editor? No editor knows about all possible macro names. –  daleif Jun 16 '14 at 14:34

To recognise the commands from a package, TeXStudio needs a corresponding file with the extension .cwl. For some of the most common packages, the cwl files are provided as standard, and they can be activated as discussed in TeXStudio doesn't recognize some commands.
I don't think cwl files are provided for algorithm2e or algorithmicx, but section 1.5 of the TeXStudio User Manual explains how to create your own.