2.5 Hexadecimal number
This is a number system to the base 16 and like octal code gives a shorthand
version of large binary numbers. It is particularly useful in microprocessor based systems
where 8 and 16 bit binary words are used. The word hexadecimal means that six
alphabetical characters are used along with those representing decimal values 0 to 9.
In this way letters A to F are used to represent numbers 10 to 15 with the code shown
below.
Binary Decimal Hexadecimal