A double dribble in basketball is a personal violation given to a player that either uses two hands to dribble, or stops with the ball and starts dribbling again. It is a dead ball turnover, meaning the opposing team gets the ball out of bounds wherever the infraction occurred. Is it one of the most elementary rules of basketball and is much more common in youth games then in professional or college matches.
A player can dribble again even after picking up his dribble if the ball is knocked out of his hands or if he resets his dribble by hitting the rim on a shot. If a shot attempt fails to hit the rim and the shooting player grabs the rebound and begins to dribble again, he will be called for a double dribble violation.
An exception to the two hand rule is known as the power dribble, and occurs when a player who is posting up uses both hands to forcefully dribble the ball once to set up a post-move or back a defender down.