ASCII Characters ␀ ␣ ¶

ASCII characters are those with Unicode codepoint from 0 to 127, inclusive. They are mostly the symbols you see on computer keyboard.

Codepoint 0 to 31, and 127, are control characters or non-printables characters. (including space, tab, newline characters). Also, codepoint 127 is DEL, usually the signal sent by the ⌫ Backspace key or ⌦ Delete on keyboard.

ASCII Character Representation

Unicode has glyphs to represent ASCII non-printables characters.

␀ ␁ ␂ ␃ ␄ ␅ ␆ ␇ ␈ ␉ ␊ ␋ ␌ ␍ ␎ ␏ ␐ ␑ ␒ ␓ ␔ ␕ ␖ ␗ ␘ ␙ ␚ ␛ ␜ ␝ ␞ ␟ ␡

Representation of Unprintable Characters

Unprintable Characters can be represented in multiple ways. By decimal, hexadecimal, by standardized abbrev, or Unicode glyph, or caret notation, and in programing languages some have C escape syntax in string.

Here's ASCII table of the first 32 codepoints, and their representation.

ASCII Table

Decimal	Hex	Abbr	Unicode Symbol	Caret Notation	C Escape Syntax	Description
0	00	NUL	␀	^@	\0	Null character
1	01	SOH	␁	^A		Start of Header
2	02	STX	␂	^B		Start of Text
3	03	ETX	␃	^C		End of Text
4	04	EOT	␄	^D		End of Transmission
5	05	ENQ	␅	^E		Enquiry
6	06	ACK	␆	^F		Acknowledgment
7	07	BEL	␇	^G	\a	Bell
8	08	BS	␈	^H	\b	Backspace
9	09	HT	␉	^I	\t	Horizontal Tab
10	0A	LF	␊	^J	\n	Line feed
11	0B	VT	␋	^K	\v	Vertical Tab
12	0C	FF	␌	^L	\f	Form feed
13	0D	CR	␍	^M	\r	Carriage return
14	0E	SO	␎	^N		Shift Out
15	0F	SI	␏	^O		Shift In
16	10	DLE	␐	^P		Data Link Escape
17	11	DC1	␑	^Q		Device Control 1 (oft. XON)
18	12	DC2	␒	^R		Device Control 2
19	13	DC3	␓	^S		Device Control 3 (oft. XOFF)
20	14	DC4	␔	^T		Device Control 4
21	15	NAK	␕	^U		Negative Acknowledgment
22	16	SYN	␖	^V		Synchronous Idle
23	17	ETB	␗	^W		End of Trans. Block
24	18	CAN	␘	^X		Cancel
25	19	EM	␙	^Y		End of Medium
26	1A	SUB	␚	^Z		Substitute
27	1B	ESC	␛	^[	\e	Escape
28	1C	FS	␜	^\		File Separator
29	1D	GS	␝	^]		Group Separator
30	1E	RS	␞	^^		Record Separator
31	1F	US	␟	^_		Unit Separator
32	040	20				space
Decimal	Hex	Abbr	Unicode Symbol	Caret Notation	C Escape Syntax	Description
33	041	21	!
34	042	22	"
35	043	23	#
36	044	24	$
37	045	25	%
38	046	26	&
39	047	27	´
40	050	28	(
41	051	29	)
42	052	2A	*
43	053	2B	+
44	054	2C	,
45	055	2D	-
46	056	2E	.
47	057	2F	/
Decimal	Hex	Abbr	Unicode Symbol	Caret Notation	C Escape Code	Description
48	060	30	0
49	061	31	1
50	062	32	2
51	063	33	3
52	064	34	4
53	065	35	5
54	066	36	6
55	067	37	7
56	070	38	8
57	071	39	9
58	072	3A	:
59	073	3B	;
60	074	3C	<
61	075	3D	=
62	076	3E	>
63	077	3F	?
64	100	40	@
Decimal	Hex	Abbr	Unicode Symbol	Caret Notation	C Escape Code	Description
65	101	41	A
66	102	42	B
67	103	43	C
68	104	44	D
69	105	45	E
70	106	46	F
71	107	47	G
72	110	48	H
73	111	49	I
74	112	4A	J
75	113	4B	K
76	114	4C	L
77	115	4D	M
78	116	4E	N
79	117	4F	O
80	120	50	P
81	121	51	Q
82	122	52	R
83	123	53	S
84	124	54	T
85	125	55	U
86	126	56	V
87	127	57	W
88	130	58	X
89	131	59	Y
90	132	5A	Z
91	133	5B	[
92	134	5C	\		\\
93	135	5D	]
94	136	5E	^
95	137	5F	_
96	140	60	`
Decimal	Hex	Abbr	Unicode Symbol	Caret Notation	C Escape Code	Description
97	141	61	a
98	142	62	b
99	143	63	c
100	144	64	d
101	145	65	e
102	146	66	f
103	147	67	g
104	150	68	h
105	151	69	i
106	152	6A	j
107	153	6B	k
108	154	6C	l
109	155	6D	m
110	156	6E	n
111	157	6F	o
112	160	70	p
113	161	71	q
114	162	72	r
115	163	73	s
116	164	74	t
117	165	75	u
118	166	76	v
119	167	77	w
120	170	78	x
121	171	79	y
122	172	7A	z
Decimal	Hex	Abbr	Unicode Symbol	Caret Notation	C Escape Code	Description
123	173	7B	{
124	174	7C	|
125	175	7D	}
126	176	7E	~
127	7F	DEL	␡	^?		Delete

Caret notation is heavily used in emacs. [see Emacs: Newline Representation ^M ^J ^L]

Non-printable ASCII is heavily used in unix terminal. See: Linux: Terminal Control Sequence Keys

Whitespace Character Representation

Here are other character representation symbols. They are often used in text editor or word processor to indicate whitespace.

Tab ↹ ⇄ ⇤ ⇥ ↤ ↦ ◁ ▷

space · ␣ ˽ ␠ ␢

paragraph, section, newline. ¶ § ␤ ↵ ↩ ⏎

Sample usage: Emacs's whitespace-mode

Unicode Keyboard Symbols ⌘ ⏎ ⌫

Unicode Keyboard Symbols ⌘ ⏎ ⌫

misc character, editing

For much more, see Unicode Punctuations † ¶ © ® ™ ☙