[Correlli]

pawn Код:

stock IsACopCar(vehicleid)
{
  if(GetVehicleModel(vehicleid) == 427 || GetVehicleModel(vehicleid) == 523 || GetVehicleModel(vehicleid) == 596
  || GetVehicleModel(vehicleid) == 597 || GetVehicleModel(vehicleid) == 598 || GetVehicleModel(vehicleid) == 599
  || GetVehicleModel(vehicleid) == 601) return true;
  return false;
}

|| stands for OR, so if vehicleModel-ID is 427 OR 523 OR 596 OR .. return true (1), otherwise return false (0).

This is just one of the ways which could be simple for you to understand.