In the hexadecimal system, what number comes after 9?

In the hexadecimal system, which is a base-16 numbering system, numbers are represented by digits ranging from 0 to 9, followed by the letters A to F. In this system, the number after 9 is represented by the letter A. This is because after reaching 9, the counting sequence continues with the addition of letters in alphabetical order, where A represents the value of 10, B represents 11, and so on. Therefore, in the hexadecimal system, the letter A comes after 9.