Hexadecimal
The number system with a base of 16 is called the hexadecimal number system. It uses sixteen distinct symbols: 0-9 for values zero to nine and A-F for values ten to fifteen.
0 and 1
The binary number system uses only two symbols: 0 and 1. This is because it is a base-2 system, which forms the basis of all binary code used in computers.
C
In the hexadecimal system, the symbol representing the decimal number 12 is C. The hexadecimal system is often used in computing and digital electronics for more efficient processing.
Nibble
A group of 4 bits is called a nibble. In computing, a nibble represents half a byte, and it can hold a value between 0 and 15 in decimal, or 0 to F in hexadecimal.