Complete asc ii code table and introduction

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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 check refers to a method used to check whether an error occurs during code transfer. It is generally divided into two types: 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.

The following table lists ASCII code tables for ease of query:

128th ~ 255 is an extended character (not commonly used)

Dec	HX	Oct	Char		Dec	HX	Oct	Char	Dec	HX	Oct	Char	Dec	HX	Oct	Char
0	0	000	Nul	(Null)	32	20	040	Space	64	40	100	@	96	60	140	'
1	1	001	Soh	(Start of heading)	33	21	041	!	65	41	101	A	97	61	141	A
2	2	002	STX	(Start of text)	34	22	042	"	66	42	102	B	98	62	142	B
3	3	003	Etx	(End of text)	35	23	043	#	67	43	103	C	99	63	143	C
4	4	004	EOT	(End of transmission)	36	24	044	$	68	44	104	D	100	64	144	D
5	5	005	Enq	(Enquiry)	37	25	045	%	69	45	105	E	101	65	145	E
6	6	006	ACK	(Acknowledge)	38	26	046	&	70	46	106	F	102	66	146	F
7	7	007	Bel	(Bell)	39	27	047	'	71	47	107	G	103	67	147	G
8	8	010	BS	(Backspace)	40	28	050	(	72	48	110	H	104	68	150	H
9	9	011	Tab	(Horizontal tab)	41	29	051	)	73	49	111	I	105	69	151	I
10	A	012	Lf	(NL line feed, new_line)	42	2a	052	*	74	4A	112	J	106	6a	152	J
11	B	013	Vt	(Vertical tab)	43	2b	053	+	75	4b	113	K	107	6b	153	K
12	C	014	FF	(NP form feed, new page)	44	2c	054	,	76	4C	114	L	108	6c	154	L
13	D	015	Cr	(Carriage return)	45	2d	055	-	77	4d	115	M	109	6d	155	M
14	E	016	So	(Shift out)	46	2e	056	.	78	4e	116	N	110	6e	156	N
15	F	017	Si	(Shift in)	47	2f	057	/	79	4f	117	O	111	6f	157	O
16	10	020	DLE	(Data Link escape)	48	30	060	0	80	50	120	P	112	70	160	P
17	11	021	DC1	(Device Control 1)	49	31	061	1	81	51	121	Q	113	71	161	Q
18	12	022	DC2	(Device Control 2)	50	32	062	2	82	52	122	R	114	72	162	R
19	13	023	DC3	(Device Control 3)	51	33	063	3	83	53	123	S	115	73	163	S
20	14	024	Dc4	(Device Control 4)	52	34	064	4	84	54	124	T	116	74	164	T
21	15	025	Nak	(Negative acknowledge)	53	35	065	5	85	55	125	U	117	75	165	U
22	16	026	SYN	(Synchronous idle)	54	36	066	6	86	56	126	V	118	76	166	V
23	17	027	Etb	(End of Trans. Block)	55	37	067	7	87	57	127	W	119	77	167	W
24	18	030	Can	(Cancel)	56	38	070	8	88	58	130	X	120	78	170	X
25	19	031	Em	(End of medium)	57	39	071	9	89	59	131	Y	121	79	171	Y
26	1a	032	Sub	(Substitute)	58	3A	072	:	90	5A	132	Z	122	7A	172	Z
27	1B	033	ESC	(Escape)	59	3b	073	;	91	5b	133	[	123	7b	173	{
28	1c	034	FS	(File separator)	60	3c	074	<	92	5C	134	\	124	7c	174
29	1D	035	GS	(Group separator)	61	3D	075	=	93	5D	135	]	125	7D	175	}
30	1e	036	RS	(Record separator)	62	3E	076	>	94	5E	136	^	126	7E	176	~
31	1f	037	Us	(Unit separator)	63	3f	077	?	95	5f	137	_	127	7f	177	Del

Extended Character Set)

ISO Latin-1 character set (encoding: 160-255)

Encoding Character Encoding Character Encoding Character Encoding Character 160 172 Bytes 184 Bytes 196 Ä 161 Bytes ¡ 173 185 Bytes 197 Bytes 162 Bytes 174 186 ° 198 Bytes 163 £. 175 Bytes 187 » 199 C. 164 Bytes 176 188 Bytes 200 ? 165 ¥ 177 ± 189 Bytes 201 É 166 Bytes 178 2. 190 Bytes 202 Bytes 167 " 179 Bytes 191 Bytes ¿ 203 Bytes 168 ○ 180 ' 192 À 204 Bytes 169 181 Μ 193 Á 205 Í 170 Bytes 182 Bytes ¶ 194 Â 206 Bytes 171 « 183 · 195 Bytes 207 Bytes

Encoding Character Encoding Character Encoding Character Encoding Character 208 Bytes 220 Ü 232 ? 244 Bytes 209 N 221 Bytes 233 É 245 Bytes 210 Bytes 222 Bytes 234 Bytes 246 Ö 211 Ó 223 Bytes 235 Bytes 247 Bytes 212 Bytes 224 À 236 Bytes 248 Ø 213 Bytes 225 Á 237 Í 249 Bytes 214 Ö 226 Â 238 Bytes 250 Úo 215 ⊙ 227 Bytes 239 Bytes 251 Bytes 216 Ø 228 Ä 240 Bytes 252 Ü 217 Bytes 229 Bytes 241 N 253 Bytes 218 Úo 230 Bytes 242 Bytes 254 Bytes 219 Bytes 231 C. 243 Ó 255 Bytes