\begin{algorithm}
  \caption{Sum of integers from 1 to n.}
    \begin{algorithmic}[1]
      \Procedure {Sum}{$n$}
        \State $sum \gets 0  \hfill \triangleright {\rm \ Initialization}$
        \For{$i \gets 1,n$}
          \State $sum \gets sum + i$        
        \EndFor
        \State \Return{$sum$} $ \hfill \triangleright {\rm \ Return}$
      \EndProcedure
    \end{algorithmic}
\end{algorithm}