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Number system and its types:-

Number system :- This is the medium by which we can represent the number into equivalent of different format when we type some letter or word the computer translate them a number because computer can understood only number.

 Types of number system 
  •     Positional number system 
  •     Non positional number system 


Positional Number System:
In positional number system, there are only a few symbols called digits, and these symbols represent different values depending on the position they occupy in the number. The value of each digit in such a number is determined by three considerations__
1.      The digit.
2.      The position of the digit in the number.
3.      The base of the number system.

Non-Positional Number System: 
In the non-positional number systems, the characters used are I for 1, II for 2, etc, and are of position invariant, i.e. each symbol represents the same value regardless of its position in the number. Since it is very difficult to perform arithmetic calculations with such a number system, positional number system were developed. 

There are following types of number system in computer:-

 1. Decimal Number system
2. Binary number system
3. octal number system
4. Hexadecimal number system

 1. Decimal number system :- the base of decimal number system is 10 and used                                               number are 0,1,2,3,4,5,6,7,8,9
as a computer programmer or IT expert we used following number system

  I. Binary Number system :- the base of binary number system is 2 and the used number are 0 and 1

 II.Octal number system :- the base of octal number system is 8 and used number are 0 to 7

 III. Hexadecimal number system :- the base of hexadecimal number system is 16 and used number are 0 to 9 and some special character that is A to F

 0,1,2,3,4,5,6,7,8,9 A,B,C,D,E,F.

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