Number System Notes: BLE

 

Number System:

The number system or the numeral system is the system of naming or representing numbers. There are various types of number systems in maths like binary, decimal, etc.

Digit:     A single character in number system or counting system having specific radix or base is called digit

Bit:         A single character (digit) in a binary number (0 or 1)is called a bit. Bit stands for Binary Digit.

Nibble: The combination of four bits is called Nibble.

Byte:     The group of eight bits is called byte.

Computer word: The number of bits that a computer uses to process at a time is called Computer word. The word length of 32-bit computer is 4bytes.

ASCII Code:        The unique numeric code assigned to 256 characters for information interchange is called ASCII code.

Parity Bit:            The additional bit used to double check the information provided is known as parity bit.

EBCDIC:                Extended Binary Coded Decimal Interchange Code is the coding system before ASCII. It used 8 bit coding system.

Memory Table                                

Bit	0 or 1
Nibble	4 Bits
Byte	8 Bits
Kilo Byte KB	1024Bytes
Mega Byte MB	1024 KB
Giga Byte GB	1024 MB
Tera Byte TB	1024 GB
Peta Byte PB	1024 TB

 

ASCII – Binary Character Table

Letter	ASCII Code	Binary	Letter	ASCII Code	Binary
a	097	01100001	A	065	01000001
b	098	01100010	B	066	01000010
c	099	01100011	C	067	01000011
d	100	01100100	D	068	01000100
e	101	01100101	E	069	01000101
f	102	01100110	F	070	01000110
g	103	01100111	G	071	01000111
h	104	01101000	H	072	01001000
i	105	01101001	I	073	01001001
j	106	01101010	J	074	01001010
k	107	01101011	K	075	01001011
l	108	01101100	L	076	01001100
m	109	01101101	M	077	01001101
n	110	01101110	N	078	01001110
o	111	01101111	O	079	01001111
p	112	01110000	P	080	01010000
q	113	01110001	Q	081	01010001
r	114	01110010	R	082	01010010
s	115	01110011	S	083	01010011
t	116	01110100	T	084	01010100
u	117	01110101	U	085	01010101
v	118	01110110	V	086	01010110
w	119	01110111	W	087	01010111
x	120	01111000	X	088	01011000
y	121	01111001	Y	089	01011001
z	122	01111010	Z	090	01011010