A hexadecimal representation is a number written using Base 16. Each digit may have only one of 16 possible values (the numerals 0 through 9 and the letters a through f). Hexadecimal representations are frequently used in computing.

All positive integers (and 0) may be written in hexadecimal representation.

Appending a zero to the right-hand side of a hexadecimal representation multiplies it by 16.