In the past, traditional slot machines operated exclusively with coins. Players would insert coins into the slot and pull a lever to spin the reels. Winnings would be paid out in coins that clattered into a metal tray. This classic experience is now largely a thing of the past in most modern casinos. 
Today, the vast majority of slot machines no longer accept physical coins. They have been replaced by more advanced systems. Modern machines use bill validators to accept paper currency. Furthermore, players almost universally use a digital credit system. They insert cash, which is converted into credits displayed on the screen. Wagers are placed and winnings are accumulated using these credits.
For players who wish to cash out, the TITO （Ticket-In, Ticket-Out） system is standard. Instead of receiving coins, you receive a printed voucher ticket when you press the cash-out button. This ticket can be inserted into another machine, or redeemed for cash at a designated kiosk or the casino cage. While some classic or nostalgic machines in certain locations might still accept coins, they are a rare exception. |
