15 in the hexadecimal number system is represented by 21 in the decimal system.
Hexadecimal
There are no specific advantages.
0 - 9 plus A - F
A power of 2. In the decimal system, we use powers of 10, in the binary system, powers of 2. Other number system use some other number as their base; for example, hexadecimal (base-16) uses powers of 16.
hexadecimal notation
Computers do much of their processing in binary. Hexadecimal is used as a kind of shortcut (easier to read for humans): each hexadecimal digit represents four binary digits.
15 in the hexadecimal number system is represented by 21 in the decimal system.
I think you meant positional number system or Positional Notation. In computer science when we talk about positional notation where talking about the binary(base 2) and hexadecimal(base 16) system. So for the most part a positional number system is a counting system. We for example use a base 10 counting system.
The decimal number 11 is equal to the hexadecimal number B.
The hexadecimal system.
16
The hexadecimal number system is one using 16 as the base instead of the more familiar ten which we use in the decimal system.
Hexadecimal
The hexadecimal number system is one using 16 as the base instead of the more familiar ten which we use in the decimal system.
On computers.
Why_you_use_octa_number_system_and_hexadecimal_number_system_in_place_of_binary_number_systen