Whether it’s to spin the reels on a slot machine, place a bet on a table game like roulette or blackjack, or throw dice at a craps table, casinos are the perfect spot to scratch your gambling itch. And thanks to mobile-friendly websites and apps, you can now enjoy the thrill of casino games on your smartphone or tablet, too!

Regardless of the type of game, casino patrons must be aware of two things: the house edge and the variance. The house edge is a mathematical guarantee that the casino will make a profit on every bet, while variance describes how much the house’s profits vary from one round to the next. The house edge and variance are calculated by mathematicians who specialize in gambling analysis.

In addition to ensuring the safety of casino patrons, casinos are also responsible for preventing fraud and theft by staff members or other patrons. This is why most casinos employ a number of security measures, including cameras and rules of conduct. For example, casino employees are required to keep their hands visible at all times when holding cards and are not allowed to leave the gaming area without a supervisor.

The world’s largest casinos are sprawling complexes that feature top-tier hotels, Michelin-starred restaurants, and designer stores. They also host high-profile entertainment shows, from circus acts to the latest music on the Billboard charts. Some even boast indoor water parks and golf courses! But what makes a great casino?