ASCII code Daquan

Currently, the most widely used character set and Its Encoding in computers are American Standard Code for information interchange (American Standard Code for information interchange) developed by the National Bureau of Standards (ANSI ), it has been set as an international standard by the International Organization for Standardization (ISO), known as the ISO 646 standard. It is applicable to all Latin characters, including 7-digit ASCII code and 8-digit ASCII code.
Because the number of one-bit binary data can be expressed as (21 =) two states: 0 and 1, while the number of two-bit binary data can be expressed as (22) = four states: 00, 01, 10, 11, and so on. A 7-bit binary number can represent (27 =) 128 States. Each State is uniquely encoded as a 7-bit binary code, corresponds to one character (or control code), which can be arranged into a decimal number ranging from 0 ~ 127. Therefore, the 7-bit ASCII code is encoded using the seven-bit binary number, which can represent 128 characters.
0th ~ 32 and 127th (34 in total) are control characters or communication special characters, such as control characters: LF (line feed), Cr (Press ENTER), FF (page feed), del (delete), BEL (zhenling); Communication special characters: Soh (Text header), EOT (Text tail), Ack (confirmation), etc;
33rd ~ 126 (94 in total) is a character, of which 48th ~ Number 57 is 0 ~ 9. 10 Arabic numerals; 65 ~ The 90 is 26 uppercase English letters, 97 ~ There are 26 lower-case English letters, and the remaining are some punctuation marks and operator numbers.
Note: In a computer's storage unit, an ascii code value occupies one byte (eight binary digits), and its highest bit (B7) is used as the parity bit. The so-called parity refersCodeA method used to check whether an error occurs during transmission. Generally, there are two methods: Odd checksum and even verification. Odd check rules: correct code must contain an odd number of 1 bytes. If the number is not an odd number, 1 is added to the highest bit B7. Even check rules: correct code: the number of 1 in a byte must be an even number. If the number is not an even number, 1 is added to the highest bit of B7.
For ease of query, the following table lists the ASCII code tables: Common ASCII code comparison tables.
128th ~ 255 is an extended character (not commonly used)

 

ASCII non-printable control characters
The numbers 0-31 in the ASCII table are assigned control characters to control peripheral devices such as printers. For example, 12 represents the form feed/New Page function. This command indicates that the printer jumps to the beginning of the next page.

Decimal	Hexadecimal	Character		Decimal	Hexadecimal	Character
0	00	Null		16	10	Data Link Conversion
1	01	Header start		17	11	Device Control 1
2	02	Start of Text		18	12	Device Control 2
3	03	Text ended		19	13	Device Control 3
4	04	Transfer completed		20	14	Device Control 4
5	05	Query		21	15	Reverse Validation
6	06	Confirm		22	16	Synchronization idle
7	07	Zhenling		23	17	Transfer Block ended
8	08	Backspace		24	18	Cancel
9	09	Horizontal Tab		25	19	Media ends
10	0a	Line feed/New Line		26	1a	Replace
11	0b	Vertical Tab		27	1B	Conversion
12	0c	Form feed/New Page		28	1c	File Separator
13	0d	Enter		29	1D	Group Separator
14	0e	Remove		30	1e	Record Separator
15	0f	Move in		31	1f	Unit Separator

ASCII print characters
The number 32-126 is assigned to characters that can be found on the keyboard. It appears when you view or print the document. The number 127 represents the DELETE command.

Decimal	Hexadecimal	Character		Decimal	Hexadecimal	Character
32	20	Space		80	50	P
33	21	!		81	51	Q
34	22	"		82	52	R
35	23	#		83	53	S
36	24	$		84	54	T
37	25	%		85	55	U
38	26	&		86	56	V
39	27	'		87	57	W
40	28	(		88	58	X
41	29	)		89	59	Y
42	2a	*		90	5A	Z
43	2b	+		91	5b	[
44	2c	,		92	5C	\
45	2d	-		93	5D	]
46	2e	.		94	5E	^
47	2f	/		95	5f	_
48	30	0		96	60	`
49	31	1		97	61	A
50	32	2		98	62	B
51	33	3		99	63	C
52	34	4		100	64	D
53	35	5		101	65	E
54	36	6		102	66	F
55	37	7		103	67	G
56	38	8		104	68	H
57	39	9		105	69	I
58	3A	:		106	6a	J
59	3b	;		107	6b	K
60	3c	<		108	6c	L
61	3D	=		109	6d	M
62	3E	>		110	6e	N
63	3f	?		111	6f	O
64	40	@		112	70	P
65	41	A		113	71	Q
66	42	B		114	72	R
67	43	C		115	73	S
68	44	D		116	74	T
69	45	E		117	75	U
70	46	F		118	76	V
71	47	G		119	77	W
72	48	H		120	78	X
73	49	I		121	79	Y
74	4A	J		122	7A	Z
75	4b	K		123	7b	{
76	4C	L		124	7c	|
77	4d	M		125	7D	}
78	4e	N		126	7E	~
79	4f	O		127	7f	Del

Expanded ASCII print characters
The expanded ASCII characters meet the requirements for more characters. The expanded ASCII contains the existing 128 characters in ASCII (numbers 0-32 are displayed in the middle), and an additional 128 characters are added, totaling 256. Even with these more characters, many languages still contain symbols that cannot be compressed to 256 characters. Therefore, there are some ASCII variants that include regional characters and symbols.
For example, many software Program The ASCII table (also known as ISO 8859-1) is used in North America, Western Europe, Australia, and Africa.

Decimal	Hexadecimal	Character		Decimal	Hexadecimal	Character
128	80	C.		192	C0	Bytes
129	81	Ü		193	C1	Bytes
130	82	É		194	C2	Bytes
131	83	Â		195	C3	Bytes
132	84	Ä		196	C4	-
133	85	À		197	C5	Bytes
134	86	Bytes		198	C6	Bytes
135	87	C.		199	C7	Bytes
136	88	Bytes		200	C8	Bytes
137	89	Bytes		201	C9	Bytes
138	8A	?		202	CA	Bytes
139	8b	Bytes		203	CB	Bytes
140	8C	Bytes		204	CC	Bytes
141	8d	Bytes		205	CD	Bytes
142	8E	Ä		206	CE	Bytes
143	8f	Bytes		207	Cf	Bytes
144	90	É		208	D0	Bytes
145	91	Bytes		209	D1	Bytes
146	92	Bytes		210	D2	Bytes
147	93	Bytes		211	D3	Bytes
148	94	Ö		212	D4	Bytes
149	95	Bytes		213	D5	Bytes
150	96	Bytes		214	D6	Bytes
151	97	Bytes		215	D7	Bytes
152	98	Bytes		216	D8	Bytes
153	99	Ö		217	D9	Bytes
154	9A	Ü		218	Da	Bytes
155	9B	Bytes		219	DB	Bytes
156	9C	£.		220	DC	Bytes
157	9d	? /TD>		221	Dd	Bytes
158	9e	? /TD>		222	De	? /TD>
159	9f	? /TD>		223	DF
160	A0	Á		224	E0	α
161	A1	Í		225	E1	Bytes
162	A2	Ó		226	E2	Gamma
163	A3	Úo		227	E3	π
164	A4	N		228	E4	Σ
165	A5	N		229	E5	σ
166	A6	Bytes		230	E6	Μ
167	A7	°		231	E7	Tau
168	A8	Bytes ¿		232	E8	Phi
169	A9