Andar Bahar is an Indian gambling game that is said to have originated in Bengaluru in the southern state of Karnataka, and it is also known in Tamil as Mangatha or Ullae Veliyae. It is a game of pure chance in which the dealer places a card face up and the player bets on one of two piles: Andar (inside) or Bahar (outside). The dealer then deals cards alternately to the two piles until a card appears that matches the initial card. The pile where this matching card appears is the winning pile. In the 21st century Andar Bahar has become a popular game in Indian online casinos.