An ASCII table is a reference guide that maps decimal, hexadecimal, and octal values to their corresponding characters in the ASCII (American Standard Code for Information Interchange) character set.

ASCII is a widely used character encoding standard that assigns unique numeric codes to represent various characters, like Decimal to Ascii including letters, numbers, punctuation marks, and control characters.

The ASCII table provides a comprehensive overview of these codes, allowing users to easily identify and understand the characters associated with specific numerical values.

 

ASCII Table of Characters Codes and Symbols

Dec	Hex	Oct	Char	Description
0	00	000	NUL	Null character
1	01	001	SOH	Start of Heading
2	02	002	STX	Start of Text
3	03	003	ETX	End of Text
4	04	004	EOT	End of Transmission
5	05	005	ENQ	Enquiry
6	06	006	ACK	Acknowledgement
7	07	007	BEL	Bell
8	08	010	BS	Backspace
9	09	011	HT	Horizontal Tab
10	0A	012	LF	Line Feed
11	0B	013	VT	Vertical Tab
12	0C	014	FF	Form Feed
13	0D	015	CR	Carriage Return
14	0E	016	SO	Shift Out
15	0F	017	SI	Shift In
16	10	020	DLE	Data Link Escape
17	11	021	DC1	Device Control 1
18	12	022	DC2	Device Control 2
19	13	023	DC3	Device Control 3
20	14	024	DC4	Device Control 4
21	15	025	NAK	Negative Acknowledgment
22	16	026	SYN	Synchronous Idle
23	17	027	ETB	End of Transmission Block
24	18	030	CAN	Cancel
25	19	031	EM	End of Medium
26	1A	032	SUB	Substitute
27	1B	033	ESC	Escape
28	1C	034	FS	File Separator
29	1D	035	GS	Group Separator
30	1E	036	RS	Record Separator
31	1F	037	US	Unit Separator
32	20	040	SPACE	Space
33	21	041	!	Exclamation Mark
34	22	042	“	Double Quote
35	23	043	#	Number Sign
36	24	044	$	Dollar Sign
37	25	045	%	Percent Sign
38	26	046	&	Ampersand
39	27	047	‘	Single Quote
40	28	050	(	Left Parenthesis
41	29	051	)	Right Parenthesis
42	2A	052	*	Asterisk
43	2B	053	+	Plus Sign
44	2C	054	,	Comma
45	2D	055	–	Hyphen-Minus
46	2E	056	.	Full Stop
47	2F	057	/	Slash
48	30	060	0	Digit Zero
49	31	061	1	Digit One
50	32	062	2	Digit Two
51	33	063	3	Digit Three
52	34	064	4	Digit Four
53	35	065	5	Digit Five
54	36	066	6	Digit Six
55	37	067	7	Digit Seven
56	38	070	8	Digit Eight
57	39</“`html	071	9	Digit Nine
58	3A	072	:	Colon
59	3B	073	;	Semicolon
60	3C	074	<	Less-Than Sign
61	3D	075	=	Equals Sign
62	3E	076	>	Greater-Than Sign
63	3F	077	?	Question Mark
64	40	100	@	At Sign
65	41	101	A	Uppercase A
66	42	102	B	Uppercase B
67	43	103	C	Uppercase C
68	44	104	D	Uppercase D
69	45	105	E	Uppercase E
70	46	106	F	Uppercase F
71	47	107	G	Uppercase G
72	48	110	H	Uppercase H
73	49	111	I	Uppercase I
74	4A	112	J	Uppercase J
75	4B	113	K	Uppercase K
76	4C	114	L	Uppercase L
77	4D	115	M	Uppercase M
78	4E	116	N	Uppercase N
79	4F	117	O	Uppercase O
80	50	120	P	Uppercase P
81	51	121	Q	Uppercase Q
82	52	122	R	Uppercase R
83	53	123	S	Uppercase S
84	54	124	T	Uppercase T
85	55	125	U	Uppercase U
86	56	126	V	Uppercase V
87	57	127	127	DEL
58	3A	072	:	Colon
59	3B	073	;	Semicolon
60	3C	074	<	Less-Than Sign
61	3D	075	=	Equals Sign
62	3E	076	>	Greater-Than Sign
63	3F	077	?	Question Mark
64	40	100	@	At Sign
65	41	101	A	Uppercase A
66	42	102	B	Uppercase B
67	43	103	C	Uppercase C
68	44	104	D	Uppercase D
69	45	105	E	Uppercase E
70	46	106	F	Uppercase F
71	47	107	G	Uppercase G
72	48	110	H	Uppercase H
73	49	111	I	Uppercase I
74	4A	112	J	Uppercase J
75	4B	113	K	Uppercase K
76	4C	114	L	Uppercase L
77	4D	115	M	Uppercase M
78	4E	116	N	Uppercase N
79	4F	117	O	Uppercase O
80	50	120	P	Uppercase P
81	51	121	Q	Uppercase Q
82	52	122	R	Uppercase R
83	53	123	S	Uppercase S
84	54	124	T	Uppercase T
85	55	125	U	Uppercase U
86	56	126	V	Uppercase V
87	57	127	W	Uppercase W
88	58	130	X	Uppercase X
89	59	131	Y	Uppercase Y
90	5A	132	Z	Uppercase Z
91	5B	133	[	Left Square Bracket
92	5C	134	\	Backslash
93	5D	135	]	Right Square Bracket
94	5E	136	^	Caret
95	5F	137	_	Underscore
96	60	140	`	Grave Accent
97	61	141	a	Lowercase a
98	62	142	b	Lowercase b
99	63	143	c	Lowercase c
100	64	144	d	Lowercase d
101	65	145	e	Lowercase e
102	66	146	f	Lowercase f
103	67	147	g	Lowercase g
104	68	150	h	Lowercase h
105	69	151	i	Lowercase i
106	6A	152	j	Lowercase j
107	6B	153	k	Lowercase k
108	6C	154	l	Lowercase l
109	6D	155	m	Lowercase m
110	6E	156	n	Lowercase n
111	6F	157	o	Lowercase o
112	70	160	p	Lowercase p
113	71	161	q	Lowercase q
114	72	162	r	Lowercase r
115	73	163	s	Lowercase s
116	74	164	t	Lowercase t
117	75	165	u	Lowercase u
118	76	166	v	Lowercase v
119	77	167	w	Lowercase w
120	78	170	x	Lowercase x
121	79	171	y	Lowercase y
122	7A	172	z	Lowercase z
123	7B	173	{	Left Curly Brace
124	7C	174	|	Vertical Line
125	7D	175	}	Right Curly Brace
126	7E	176	~	Tilde
127	7F	177	DEL	Delete

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Frequently asked Questions related to ASCII Tables:

What is the purpose of an ASCII table?

An ASCII table serves as a visual representation of the ASCII character set, enabling users to find the character associated with a particular numeric code and vice versa. It is widely used in programming, data processing, and telecommunications to facilitate the accurate representation and transmission of textual data.

How do I read an ASCII table?

An ASCII table consists of columns that display the decimal, hexadecimal, and octal values, along with the corresponding characters and their descriptions. To read the table, locate the desired value or character in its respective column to find the associated information.

Let’s say you want to find the ASCII code for the uppercase letter ‘A’. To do this, you can refer to an ASCII table.

Here are the steps to follow:

1. Locate the ‘A’ row: In the ASCII table, look for the row that represents the uppercase letter ‘A’. In most ASCII tables, the uppercase letters are listed in consecutive rows.
2. Identify the decimal value: In the ‘A’ row, find the column that corresponds to the decimal values. In this case, it is usually the second column. Check the value in that column, and you’ll find that the decimal value for ‘A’ is 65.
3. Note the hexadecimal and octal values: Adjacent to the decimal value, you’ll find the hexadecimal and octal values. For ‘A’, the hexadecimal value is 41, and the octal value is 101.
4. Understand the character description: Finally, in the ‘Char’ or ‘Character’ column, you’ll find the character associated with the decimal value. In this case, the character description for 65 is ‘A’, indicating that it represents the uppercase letter ‘A’.

By following these steps, you can read an ASCII table and find the decimal, hexadecimal, and octal values for specific characters. This example can be useful when working with ASCII-based systems, encoding or decoding text, or understanding the numeric representation of characters in programming or data processing tasks.

What is the significance of the ASCII character set?

The ASCII character set was developed to standardize character encoding across different computer systems and ensure compatibility in exchanging textual data. By assigning unique codes to characters, ASCII allows computers to accurately represent and interpret written information, enabling seamless communication and data processing.

Are there any limitations to ASCII?

ASCII originally supported only a limited range of characters, primarily consisting of the English alphabet, numbers, and common symbols. It does not include characters from other languages or special characters used in advanced formatting. As a result, extended character sets like Unicode have been developed to overcome these limitations and support a broader range of languages and symbols.

How can I use an ASCII table in programming?

In programming, an ASCII table is valuable for tasks such as converting between characters and their corresponding numeric codes, manipulating and analyzing textual data, and ensuring proper encoding and decoding of information. It provides a quick reference for programmers working with ASCII-based systems or when dealing with character manipulation in their code.