Package algorithm to use

Question

Please, what package can i use in latex to have the model of algorithm in the figure ?

Answer 1

As has been mentioned in a comment, the algorithm2e package gives you the desired layout:

\documentclass{article}
\usepackage[ruled]{algorithm2e}

\begin{document}

\begin{algorithm}
\Begin{
$V \longleftarrow U$\;
$S \longleftarrow \emptyset$\;
\For{$x\in X$}{
$NbSuccInS(x) \longleftarrow 0$\;
$NbPredInMin(x) \longleftarrow 0$\;
$NbPredNotInMin(x) \longleftarrow |ImPred(x)|$\;
  }
}
\caption{My Algorithm}
\label{alg:test}
\end{algorithm}

\end{document}