Run (cricket)

In the sport of cricket, a run is the basic unit of scoring. Runs are scored by a batsman, and the aggregate of the scores of a team's batsmen (plus any extras) constitutes the team's score.
A batsman scoring 50 (a 'half century') or 100 runs (a 'century', 'hundred' or 'ton'), or any higher multiple of 50 runs, is considered a particular achievement. By extension, a partnership of two batsmen moving the team score on by a multiple of 50 runs, or the team score passing a multiple of 50 runs, is also cause for celebration.
Rules
The rules concerning the scoring of runs are mostly contained in Law 18 of the Laws of cricket. The simplest way for a batsman to score a run is by the striker hitting the ball such that both batsmen can run from one end of the pitch to the other without either batsman getting out: the batsmen effectively exchanging positions, so the striking batsman becomes the non-striker, and vice versa. The batsmen may be able to run up and down...