What position does the number on a basketball jersey represent?

The jersey number is the code name of the player on the field and has no relation to the player's strength, for the convenience of referees using gestures to represent the player's data.
The jersey numbers are chosen by the players themselves, and everyone can choose the number according to their preference.There should be no duplicate jersey numbers within a team, and the referee's hands should be from {{0}} The number must be between 0 and 99, as only numbers up to 99 can be represented.Also, once a jersey number is retired from a team, no other member of the team can continue to wear that number. .