[Dayrion]

Quote:

Originally Posted by SyS hexadecimal is a base 16 number system. https://en.wikipedia.org/wiki/Hexadecimal

Plus, we are using a base 10 number system that's why letters has been added after 9 to complete that system.
Base 10 :
0 1 2 3 4 5 6 7 8 9

Base 16 :
0 1 2 3 4 5 6 7 8 9 A B C D E F

10(10) = A(16) = 12(8) = 1010(2)

OT: I linked you a page that explains how you can do what you actually wants. You don't need further help I guess.