Definition : Hexadecimal Number System (Base 16)
Hexadecimal Number System is a base 16 number system, uses combinations of numerals 0 to 9 and alphabetic characters A to F to represent any number.
Hexadecimal numbers are represented with 16 at their base, for example 1AF16.
Definition : Binary Number System (Base 2)
A binary number system represents a number in terms of only two numerals, i.e., 0 (zero) and 1 (one).
In the word "binary", "bi" means "two". Binary numbers are represented with 2 at their base, for example 10101012.