After the blinds have been posted, two hole cards are dealt to each active player, after which the first betting round begins with the player to the left of the big blind. There is no limit to the number, or quantity, of raises that a player may make in any round.
A player who does not have enough chips to call a bet is declared “All-In”. That player is eligible for the portion of the pot to the point of his final wager, the “main pot”. All further betting action involving other players takes place in a “side pot”, which is unavailable to the player who has already gone All-In.