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Ch.3 Number and Character Coding Systems - Coggle Diagram
Ch.3 Number and Character Coding Systems
3.1 Denary, Binary and Hexadecimal Number Systems
Denary number System
use it in our daily life
Binary Number System
Computers use it
Hexadecimal Number System
Programmers use it to communicate with computers
3.2 Number System Conversion
Binary number 1011 to Denary number
(1x2^3) + (1x2^2) + (1x2^1) + (1x2^0)
=11
Hexadecimal number 2CA9 to Denary number
(2x16^3) + (12x16^2) + (10x16^1) + (9x16^0) =11433
Denary number 37 to binary number
37/2=18...1
18/2=9...0
9/2=4...1
4/2=2...0
2/2=1...0
=100101
Binary number to hexadecimal number
1110 0101
Step 1, 1110 = 14 = E
Step 2 , 0101 = 5
= E5
3.3 Number Representation in Computer Systems
Bit, Byte and Word
Bit
basic unit
represent one of two distinct value
( 0 or 1,True or False)
8-bit = (2^8) = 256 distinct values
Byte
1B =8b
Word
natural unit of data used by a computer
word length is measured in bits
usually 16 ,32,16 bits long
Binary number system
computer uses in storing number and performing number
Conversion of unit
The difference of each unit is (2^10)=1024 times
Unsigned Binary Integer
representation that contains no sign symbol
Non-negative integers such as population and sales volume of books