As players move the ball up, down and around the court, they must either throw it or dribble it on the floor while walking or running. Carrying the ball for more than two steps without dribbling it is a “traveling” violation. Dribbling the ball, stopping and then starting to dribble again is a “double dribble” violation. Players must always keep their hands on top of the basketball when dribbling -- never underneath it. Holding the ball from underneath is a “carry” violation. Players might commit fouls if they interfere with play illegally or if they have illegal contact with a player on the opposing team. If an official calls a foul, the opposing team might get the ball or they might get free throws.