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01 NUMBER SYSTEM
Your Aim
to learn about:
What is Number System? Decimal to Binary Conversion
Binary to Decimal Conversion Operations on Binary Numbers
A computer takes data from a user and produces result as information. Although the words data
and information are often used interchangeably, but there is an important distinction between
the two words. In the strict sense, data consists of the raw facts that computers organise to
produce 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 start counting
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.
Tech Funda
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.
WHAT IS NUMBER SYSTEM?
A Number System is simply a method of counting. There are many number systems in existence.
Consider a clock. Clocks have 24 hours, each hour has 60 minutes. Each minute is in turn has
60 seconds. When you learnt to count, you used the numbers, like 1, 2, 3, etc. Similarly, computers
also have their own number system, known as the binary number system.
Number System 7

