sub counter {
  state $count = 0;
  $count++;
}

##</code><code>##

{
  my $count = 0;
  sub counter {
    $count++;
  }
}

##</code><code>##

{
  my $count = 0;
  sub counter1 {
    $count++;
  }
  sub counter2 {
    $count += 2;
  }
}