Definition : Decimal Number System (Base 10)
Decimal number is the most commonly used number system. It is a base 10 number system, uses combinations of numerals 0 to 9 to represent any number.
It is widely used in everyday life for representing and manipulating numbers in many cultures and scientific applications.
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.