Class XI Chapter 2 Data Representation By Afeef.pptx

Number system

1. Data Representation By: Afeef Adil Aleem Grade: XI-B GISN

2. Number system Binary Octal Decimal Hexadecimal

3. Binary Number S ystem A binary number system is one of the four types of number system. In computer applications, where binary numbers are represented by only two symbols or digits, i.e. 0 (zero) and 1(one). The binary numbers here are expressed in the base-2 numeral system.

4. Octal Number System The octal numeral system is the base-8 number system, and uses the digits 0 to 7. That means there are only 8 symbols or digits (0, 1, 2, 3, 4, 5, 6, 7) used to form other numbers. The main advantage of using the octal number system is that it uses fewer digits than the decimal and hexadecimal number system.

5. Decimal Number System A number system which uses digits from 0 to 9 to represent a number with base 10 is the decimal system number. The number is expressed in base-10 where each value is denoted by 0 or first nine positive integers. Each value in this number system has the place value of power 10.

6. Hexadecimal Number System The hexadecimal number system is a type of number system, that has a base value equal to 16. It is also pronounced sometimes as 'hex'. Hexadecimal numbers are represented by only 16 symbols. These symbols or values are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E and F. Each digit represents a decimal value.

7. Decimal-Binary  1  1 2  10 3  11 4  100 5 -  101 6 -  110 7  111 8 -  1000 9 -  1001 10  1010 11  1011 12  1100 13  1101 14  1110 15  1111 16  10000 17  10001 18  10010 19 -  10011 20  10100

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