ASCII

ASCII is a special way of encoding characters, which was mainly used in the 1960s-1970s, and more recently it has been used in EsoLangs. ASCII stands for American Standard Code for Information Interchange. ASCII uses 8 binary digits (bits) to represent characters: 1000001 (65) represents the upper-case letter A; 1000010 represents B; 1000011 represents C; and so on in sequence.

Eight bits allowed a parity bit to be included in each byte sent over a serial port or modems, this bit is used for avoiding errors. This was more important years ago when connections were often noisy.

For esolangs, most of ASCII before 32 won't be relevant. The main pre-32 characters are NULL and new line.

Binary	Decimal	Hexadecimal	Character
0000000	0	00	NULL
0000001	1	01	Start of Heading
0000010	2	02	Start of Text
0000011	3	03	End of Text
0000100	4	04	End of Transmission
0000101	5	05	Enquiry
0000110	6	06	Acknowledgement
0000111	7	07	Bell
0001000	8	08	Backspace
0001001	9	09	Horizontal Tab
0001010	10	0A	New Line
0001011	11	0B	Vertical Tab
0001100	12	0C	Form Feed
0001101	13	0D	Carriage Return
0001110	14	0E	Shift Out
0001111	15	0F	Shift In
0010000	16	10	Data Link Escape
0010001	17	11	Device Control 1
0010010	18	12	Device Control 2
0010011	19	13	Device Control 3
0010100	20	14	Device Control 4
0010101	21	15	Negative Acknowledgement
0010110	22	16	Synchronous Idle
0010111	23	17	End of Transmission Block
0011000	24	18	Cancel
0011001	25	19	End of Medium
0011010	26	1A	Substitute
0011011	27	1B	Escape
0011100	28	1C	File Separator
0011101	29	1D	Group Separator
0011110	30	1E	Record Separator
0011111	31	1F	Unit Separator
0100000	32	20	Space
0100001	33	21	!
0100010	34	22	"
0100011	35	23	#
0100100	36	24	$
0100101	37	25	%
0100110	38	26	&
0100111	39	27	'
0101000	40	28	(
0101001	41	29	)
0101010	42	2A	*
0101011	43	2B	+
0101100	44	2C	,
0101101	45	2D	-
0101110	46	2E	.
0101111	47	2F	/
0110000	48	30	0
0110001	49	31	1
0110010	50	32	2
0110011	51	33	3
0110100	52	34	4
0110101	53	35	5
0110110	54	36	6
0110111	55	37	7
0111000	56	38	8
0111001	57	39	9
0111010	58	3A	:
0111011	59	3B	;
0111100	60	3C	<
0111101	61	3D	=
0111110	62	3E	>
0111111	63	3F	?
1000000	64	40	@
1000001	65	41	A
1000010	66	42	B
1000011	67	43	C
1000100	68	44	D
1000101	69	45	E
1000110	70	46	F
1000111	71	47	G
1001000	72	48	H
1001001	73	49	I
1001010	74	4A	J
1001011	75	4B	K
1001100	76	4C	L
1001101	77	4D	M
1001110	78	4E	N
1001111	79	4F	O
1010000	80	50	P
1010001	81	51	Q
1010010	82	52	R
1010011	83	53	S
1010100	84	54	T
1010101	85	55	U
1010110	86	56	V
1010111	87	57	W
1011000	88	58	X
1011001	89	59	Y
1011010	90	5A	Z
1011011	91	5B	[
1011100	92	5C	\
1011101	93	5D	]
1011110	94	5E	^
1011111	95	5F	_
1100000	96	60	`
1100001	97	61	a
1100010	98	62	b
1100011	99	63	c
1100100	100	64	d
1100101	101	65	e
1100110	102	66	f
1100111	103	67	g
1101000	104	68	h
1101001	105	69	i
1101010	106	6A	j
1101011	107	6B	k
1101100	108	6C	l
1101101	109	6D	m
1101110	110	6E	n
1101111	111	6F	o
1110000	112	70	p
1110001	113	71	q
1110010	114	72	r
1110011	115	73	s
1110100	116	74	t
1110101	117	75	u
1110110	118	76	v
1110111	119	77	w
1111000	120	78	x
1111001	121	79	y
1111010	122	7A	z
1111011	123	7B	{
1111100	124	7C	|
1111101	125	7D	}
1111110	126	7E	~
1111111	127	7F	Delete

See also

• Wikipedia:ASCII
• Unicode
• LSCEF