What position does the number on the basketball jersey represent?

The jersey number is the code name of a player on the field, and for the convenience of the referee using gestures to represent the player's data, it is not related to the player's strength.
The jersey number is chosen by the player themselves, and everyone can choose the number according to their preferences. There should be no duplicate jersey numbers within a team, and the number should be between 0 and 99, because the referee's two hands can only represent numbers between 0 and 99. In addition, once a jersey number is retired from a team, other members of the team will not be able to continue wearing it.