Radix refers to the base or the number of unique digits (including zero) that a numeral system uses to represent numbers. The most common numeral system is the decimal system, which has a radix of 10, as it uses 10 unique digits (0-9) to represent numbers. Other examples include the binary system (radix 2 using 0 and 1), hexadecimal system (radix 16 using 0-9 and A-F), and octal system (radix 8 using 0-7).
