Difference between ascending order and descending order Mysql php

Description

What is the Difference between Ascending and Descending Order Ascending Order or Descending Order Difference Between Ascending and Descending

 

Select * from batchlistshowtime  order by id desc LIMIT 50

Descending Order

E.g. 24, 20, 17, 13 and 9

Ascending Order

E.g. 6, 10, 14, 17 and 21