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1. Looping statements
Topics
 Number system and base of number system
 Conversion among number system
 Subtraction using 1’s and 2’s complement

2. Number system and base
 Number System: The process of
representing number is known as number
system. We normally use Decimal number
system to represent number. There are
many number system exist in the world.
Some are Decimal, Binary, Octal,
Hexadecimal number system.
 Base of number system: The number of digit
used by the specific number system is
known as base of that number system.

3. Continue…
Number
system
Base Digit
Decimal 10 0-9
Binary 2 0,1
Octal 8 0-7
Hexadecimal 16 0-9,A,B,C,D,E,F

4. Decimal to Binary, Octal, Hexadecimal
Number System
 If we want to convert a decimal number system to
Binary/Octal/Hexadecimal, the process is the
same. In case of integer decimal number, we have
to divide the number with corresponding number
system’s base successively until we get a zero as
quotient and the remainder in opposite order is the
result.
 In case of exponent/fraction number we have to
multiply with corresponding number system’s base
successively (only with fraction part) until we get a
zero as fraction and the inter part in each
multiplication result in regular order is the result.

5. Number system and base
 Number System: The process of
representing number is known as number
system. We normally use Decimal number
system to represent number. There are
many number system exist in the world.
Some are Decimal, Binary, Octal,
Hexadecimal number system.
 Base of number system: The number of digit
used by the specific number system is
known as base of that number system.

6. Number system and base
 Number System: The process of
representing number is known as number
system. We normally use Decimal number
system to represent number. There are
many number system exist in the world.
Some are Decimal, Binary, Octal,
Hexadecimal number system.
 Base of number system: The number of digit
used by the specific number system is
known as base of that number system.