## NUMBER SYSTEMS

A number system is defined as a system of writing to express numbers.

The four common type of number system are:-

**Decimal Number System**The decimal numeral system is the standard system for denoting integer and non-integer numbers.It's also called Hindu-Arabic number system.Positional numeral system employing 10 as the base and requiring 10 different numerals,the digits 0,1,2,3,4,5,6,7,8,9.It also requires a dot(decimal point) to represent decimal fractions.**Binary Number System**In binary number system,the value of base is 2.It is a way to write numbers using only two digit:0and1.These are used in computers as a series of "off" and "on" switches.**Octal Number System**

In octal number system,the base is 8.There are only eight symbols or digits:0,1,2,3,4,5,6,7(8and9 do not exist).The largest single digit is 7.**Hexadecimal Number System**

In hexadecimal number system,the base is 16.The first 10 digits are the same digits of decimal number system-0,1,2,3,4,5,6,7,8 and 9.The remaining six digits are the symbols A,B,C,D,E and F,representing decimal values 10,11,12,13,14 and 15,respectively.