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Number System




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                         Learning Outcomes


                             Number System                             Decimal to Binary Conversion


                             Binary to Decimal Conversion              Operations on Binary Numbers





                 Although the words, 'data' and 'information' are often used interchangeably, there is an important
                 distinction between the two words. Data consists of the raw numbers that computers organise to
                 produce information. In other words, raw facts or figures is data while processed data is information.
                 From an early age, we are introduced to the concept of numbers and counting. Toddlers learn at
                 an early age that they can carry two cookies, one in each hand. Kindergarteners begin learning
                 to count by twos and fives. Invariably, we use the decimal number system. Our number system is
                 based on 10, most likely because we have 10 fingers. Let us learn more about the number system.

                    Info Byte

                       The numerical digits we use today, such as 1, 2, and 3, are based on the Hindu-Arabic
                        numeral system developed over a thousand years ago.
                       The number 0 is known by various names, including zero, nought, naught, nil, zilch,
                        and zip.


                  i +  NUMBER SYSTEM


                 A number system  is a way  to express quantities used for  counting,  comparing  amounts,
                 performing calculations and representing values. A computer represents all kinds of data and
                 information like text, numbers, audio and video in binary form. The total number of digits used
                 in a number system is called its base or radix. There are four types of number systems: Binary
                 number system, Decimal number system, Octal number system and Hexadecimal number system.
                 Therefore, when someone says that they are working with a number system of radix 2, it means
                 base 2, that is, the binary number system. The base is written after the number as a subscript
                 such as (512) . In this example, the number 10 is written as the subscript to express the number
                              10
                 in the decimal number system.



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                                                                                               Number System
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