what is cnf in railway reservation

CNF in railway reservation stands for "Confirmed". When a passenger books a reserved railway ticket for a train in Indian Railways, all the details of passengers are stored in a relational database of centralized reservation system. As every train has a limited number of seats, sometimes one may not get a confirmed reserved ticket. The current status of such a waitlist (W/L) ticket changes when there is any availability of reserved seats due to cancellation. This new current reservation status is generally known as PNR status. If the PNR status shows CNF, it means that the seats are confirmed.