use strict; use warnings; my $state = \&start; while (my $next = $state->()) { $state = $next; } sub start { ...get input... if (/1/) { return \&menu_1 } elsif (/2/) { return \&menu_2 } ... } sub menu_1 { ... } sub menu_2 { ... } #### use strict; use warnings; my $state = \&start; while (my $next = $state->()) { $state = $next; } sub start { my %next_action = ( 1 => \&menu_1, 2 => \&menu_2, 3 => \&menu_3, ); return $next_action{$_} if exists $next_action{$_} }