Save guides, add subjects and pick up where you left off with your BBC account. Hexadecimal close hexadecimalA number system using 16 symbols from 0-9 and A-F, also known as base 16 and hex., also ...

Hexadecimal , also known as hex, is the third commonly used number system. It has 16 units (0-9) and the letters A, B, C, D, E and F.