**what is a number system in computer**

The wide variety gadget is used for counting special things. Each wide variety gadget makes use of a base which is called „radix‟.

There are four types of number systems are generally used that are:

1. Decimal Number System

2. Binary Number System

3. Octal Number System

4. Hexadecimal Number

**1. Decimal Number System: **System Decimal Number System: The Decimal Number System has ten numbers that are zero,1,2,3,4,5,6,7,8,nine consequently its radix (base) is 10.

**2.Binary Number System:** The Binary Number System has numbers that are zero and 1 consequently its radix (base) is

**3. Octal Number System:** The Octal Number System has 8 numbers that are zero,1,2,3,4,5,6 and seven consequently its radix (base) is 8.

**4.Hexadecimal Number System:** The Hexadecimal Number System has 16 numbers that are zero,1,2,3,4,5,6,7,8,nine,A,B,C,D,E and F consequently its radix (base) is 16.