all rules of bowling in cricket ODI test T20
A bowler delivers the ball toward the batsmen, using what is known as a bowling action: the elbow may be held at any angle and may bend further, but may not straighten out during the action. If the elbow straightens, it is an illegal throw and the delivery is called a no-ball. Under new cricketing law, after consultation with health experts, the bowler is allowed to straighten his arm 15 degrees or less, if the bowler straightens his or her arm more than 15 degrees it is called a “no ball”. This new law came in to prevent injury to bowlers. Usually, the bowler pitches the ball so that it bounces before reaching the batsman. Some part of the bowler’s front foot in the delivery stride (that is, the stride when the ball is released) must be behind the popping crease to avoid a no-ball (although the bowler’s front foot does not have to be grounded). The ball must also be delivered so it is within the batsman’s reach; otherwise it is termed a wide. A wide cannot be called if the batsman hits the ball. A wide or no-ball results in an extra run being added to the batting team’s score, and an extra ball being bowled in the over.
The bowler’s primary goal is to take wickets; that is, to get a batsman out or dismissed. If a bowler can dismiss the more accomplished batsmen on the opposing team he reduces the opportunity for them to score, as it exposes the less skilful batsmen. Their next task is to limit the numbers of runs scored per over they bowl. This is known as the Economy rate. If a bowler gets a batsman out, he is credited for this achievement. There are two main kinds of bowlers: pace bowlers and spin bowlers.