documentclass{article}

usepackage{algorithm2e}

begin{document}

vspace{2em}

begin{algorithm}[H]
KwData{this text}
KwResult{how to write algorithm with LaTeX2e }
initialization;
While{not at end of this document}{
read current;
eIf{understand}{
go to next section tcp*[f]{Case (1)} ;
current section becomes this one;
}{
go back to the beginning of current section;
}
}
end{algorithm}

Analyis: Consider Case (1).

end{document}