ASCII table (printable characters)

Uppercase A is ASCII 65, lowercase a is 97, and the digit 0 is 48. Lowercase letters sit exactly 32 above their capitals.

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ASCII table (printable characters)
Decimal	Hex	Binary	Character
32	20	0100000	(space)
33	21	0100001	!
34	22	0100010	"
35	23	0100011	#
36	24	0100100	$
37	25	0100101	%
38	26	0100110	&
39	27	0100111	'
40	28	0101000	(
41	29	0101001	)
42	2A	0101010	*
43	2B	0101011	+
44	2C	0101100	,
45	2D	0101101	-
46	2E	0101110	.
47	2F	0101111	/
48	30	0110000	0
49	31	0110001	1
50	32	0110010	2
51	33	0110011	3
52	34	0110100	4
53	35	0110101	5
54	36	0110110	6
55	37	0110111	7
56	38	0111000	8
57	39	0111001	9
58	3A	0111010	:
59	3B	0111011	;
60	3C	0111100	<
61	3D	0111101	=
62	3E	0111110	>
63	3F	0111111	?
64	40	1000000	@
65	41	1000001	A
66	42	1000010	B
67	43	1000011	C
68	44	1000100	D
69	45	1000101	E
70	46	1000110	F
71	47	1000111	G
72	48	1001000	H
73	49	1001001	I
74	4A	1001010	J
75	4B	1001011	K
76	4C	1001100	L
77	4D	1001101	M
78	4E	1001110	N
79	4F	1001111	O
80	50	1010000	P
81	51	1010001	Q
82	52	1010010	R
83	53	1010011	S
84	54	1010100	T
85	55	1010101	U
86	56	1010110	V
87	57	1010111	W
88	58	1011000	X
89	59	1011001	Y
90	5A	1011010	Z
91	5B	1011011	[
92	5C	1011100	\
93	5D	1011101	]
94	5E	1011110	^
95	5F	1011111	_
96	60	1100000	`
97	61	1100001	a
98	62	1100010	b
99	63	1100011	c
100	64	1100100	d
101	65	1100101	e
102	66	1100110	f
103	67	1100111	g
104	68	1101000	h
105	69	1101001	i
106	6A	1101010	j
107	6B	1101011	k
108	6C	1101100	l
109	6D	1101101	m
110	6E	1101110	n
111	6F	1101111	o
112	70	1110000	p
113	71	1110001	q
114	72	1110010	r
115	73	1110011	s
116	74	1110100	t
117	75	1110101	u
118	76	1110110	v
119	77	1110111	w
120	78	1111000	x
121	79	1111001	y
122	7A	1111010	z
123	7B	1111011	{
124	7C	1111100	\|
125	7D	1111101	}
126	7E	1111110	~

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How it is computed

Each row gives a character's code point in the ASCII standard, written in decimal, hexadecimal and 7-bit binary. Codes 0 to 31 and 127 are control characters (line feed, tab, delete) and are not printable, so they are left out.

FAQ

What is the difference between ASCII and Unicode?+

ASCII defines 128 characters in 7 bits. Unicode extends it to every script; its first 128 code points are exactly ASCII, and UTF-8 stores them in one byte each.

How do I switch between upper and lower case with codes?+

Add 32 to an uppercase letter's code for its lowercase form (A = 65, a = 97), or flip the bit worth 32.