About algorithm package

Question

I'm making an algorithm figure using usepackage[ruled, lined, linesnumbered, commentsnumbered, longend]{algorithm2e} and usepackage{algpseudocode}.
documentclass{article}

usepackage[ruled, lined, linesnumbered, commentsnumbered, longend]{algorithm2e}
usepackage{xcolor}
usepackage{algpseudocode}

begin{document}
begin{algorithm}
    KwResult{Best solution found for distribution}
    Population  initialization

For{population size}{
        execute phasesComment{Mutation and crossover}
        
        If{elitism}{ 
            $population[0] = fittest$ Comment{Next evolution}
         }
    }
    KwRet{$fittest$}
    caption{Genetic algorithm}label{alg:genetic}
end{algorithm}
end{document}

and I'd like to add two details:

Add a Require tag. I tried to add it using Require but it doesn't work. Do I need another package additionally? Something like:

Change the style of the number lines, similar to these ones:

I appreciate any help/info. Thanks!

Werner · Accepted Answer

Don't mix the use of algorithm packages like algorithm2e and algorithmicx (which provides algpseudocode). You should stick to one. In your case it seems like algorithm2e provides the functionality that you're interested in, so build on that.
The minimal example provides KwRequire and a new Comment, together with the appropriate line number formatting.

documentclass{article}

usepackage[ruled,lined,linesnumbered]{algorithm2e}
DontPrintSemicolon

% Set algorithm keyword formatting
newcommand{Var}{textup}
newcommand{Comment}{tcc*[r]}
SetKwComment{tcc}{$triangleright$~}{}
SetCommentSty{normalfont}
SetKwInput{KwRequire}{Require}
% Set algorithm line numbers
SetNlSty{}{}{:}

begin{document}

begin{algorithm}
  KwRequire{Some data input}
  KwResult{Best solution found for distribution}
  Population initialization;
  For{population size}{%
    execute phases Comment{Mutation and crossover}
    If{elitism}{%
      $Var{population[0]} = Var{fittest}$ Comment{Next evolution}
    }
  }
  KwRet{$Var{fittest}$}
  caption{Genetic algorithm}
end{algorithm}

end{document}

About algorithm package

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