Hi, I'm learning to use perl and I made the following code but it doesn't print the variable "aristas" and "clust", would you help me finding why doesn't the code print those variables?

use strict;
use warnings;


    
    my $nodos;
    my $n;
    my $i;
    my $j;
    my $l;
    my $aristas;
    my $areales;
    my $clust;
    my %red=();
    $aristas=0;
    print"Indica el numero de nodos\n";
    $nodos=<STDIN>;
    #aqui se declara la matriz una vez que se sabe el numero de nodos
    print"Introduzca las conecciones de los nodos.\n";
    for($n=0; $n<$nodos; $n++){
        for($i=0; $i<$nodos; $i++){
            if($n!=$i){
                $red{$n}{$i}=<STDIN>;
            }
        }
        
    }
    
    
    for($n=0; $n<$nodos; $n++){
        $aristas=0;
        for($i=0; $i<$nodos; $i++){
            if($n!=$i){
                if($red{$n}{$i}==1){
                    $aristas++;
                }
            }
        }
        
        print"la posicion del nodo en escala vector, numero de aristas
+ y coeficiente de clustering respectivamente:\n";
        print"\n$n";
        
        print"\n$aristas";
        
        
        if($aristas==1||$aristas==0){
            
            print"0\n";
        }
        else{
            
            $areales=0;
            for($j=0; $j<$nodos; $j++){
                if($n!=$j){
                    for($l=0; $l<$nodos; $l++){
                        if($j!=$l&&$l!=$n){
                            if($red{$j}{$l}==1){
                                $areales++;
                                
                            }
                        }
                    }
                }
            }
            $areales=$areales/2;
            $clust=(2*$areales)/($aristas*($aristas-1));
            
            print"$clust";
            
        }
    }

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In reply to help :) by Harry_Sor

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