# File lib/modai_prct12/matrizDensa.rb, line 12
        def to_s

                fil = 0
                print "["
                while fil < filas

                        col = 0                                      
                        while col < columnas

                                print "#{matriz[fil][col].to_s}"
                                if (col + 1) < columnas then print ", " end
                                col += 1

                        end

                        if (fil + 1) < filas then print ", " end
                        fil += 1

                end
                print "]"

        end