while (<READ_FILE>)
{
   if ($cur_code == $area_code)
   {
      //Some logic here
   }
   else
   {
      $cur_code = $area_code;

      if ($first_time == 1)
      {
         $first_time = 0;
      }
      else
      {
         //Some logic here
      }
   }

   print "Hello";
}