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Number System
Goal Glimpse
Number System Decimal to Binary Conversion
Binary to Decimal Conversion Operations on Binary Numbers
Although the terms 'data' and 'information' are often used interchangeably, they have different
meanings. Data refers to raw numbers and facts, while information is the organised and processed
result of data.
From a young age, we are introduced to numbers and counting. Toddlers learn to recognise
quantities, like holding two cookies, one in each hand. Kindergarteners begin counting by twos
and fives. Our number system is based on 10, likely because we have 10 fingers. Let's explore the
number system further.
Boost Bits
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.
NUMBER SYSTEM
A number system is simply a method of counting. Many different number systems exist. Consider
a clock: it has 24 hours, each hour has 60 minutes, and each minute has 60 seconds. When you
learned to count, you used numbers like 1, 2, 3, and so on. Similarly, computers use their own
number system called the binary number system.
Digital computers represent all types of data and information, such as audio, graphics, video,
text, and numbers, in binary form. The total number of digits used in a number system is called
its base or radix. For example, the binary number system has a radix of 2, meaning it uses only
two digits: 0 and 1. The base is written as a subscript after the number, such as (512)₁₀, where the
subscript 10 indicates that the number is in the decimal number system.
Number System 21

