ASCII Codes

There was a time when every book on programming had a table of ASCII codes as an appendix. The ASCII codes (American Standard Code for Information Interchange) used the numbers from 32 to 127 to represent characters of the English alphabet.

The tables were included in the books because it was impossible to do much in the way of programming without referring to ASCII codes. Modern high-level languages do not rely on these codes as heavily but there are still times when you might use them to:

Read information from a file in an unusual format
Encrypt or decrypt a password
Produce a character which is not on your keyboard
Produce a character (typically a quote) which would cause a syntax error if types explicitly.

Access and FoxPro both use the same names for the functions which manipulate ASCII:

Asc(number) returns the character with that ASCII code.
Chr(character) returns the ASCII code of that character.

Table of ASCII codes

This table lists the decimal and hexadecimal codes for the characters. The Asc() and Chr() functions both work with decimal values but if you are reading from a binary file then you will need the hexadecimal values.

Dec	Hex	Char	Dec	Hex	Char	Dec	Hex	Char
32	20	(space)	64	40	@	96	60	`
33	21	!	65	41	A	97	61	a
34	22	"	66	42	B	98	62	b
35	23	#	67	43	C	99	63	c
36	24	$	68	44	D	100	64	d
37	25	%	69	45	E	101	65	e
38	26	&	70	46	F	102	66	f
39	27	'	71	47	G	103	67	g
40	28	(	72	48	H	104	68	h
41	29	)	73	49	I	105	69	i
42	2a	*	74	4a	J	106	6a	j
43	2b	+	75	4b	K	107	6b	k
44	2c	,	76	4c	L	108	6c	l
45	2d	-	77	4d	M	109	6d	m
46	2e	.	78	4e	N	110	6e	n
47	2f	/	79	4f	O	111	6f	o
48	30	0	80	50	P	112	70	p
49	31	1	81	51	Q	113	71	q
50	32	2	82	52	R	114	72	r
51	33	3	83	53	S	115	73	s
52	34	4	84	54	T	116	74	t
53	35	5	85	55	U	117	75	u
54	36	6	86	56	V	118	76	v
55	37	7	87	57	W	119	77	w
56	38	8	88	58	X	120	78	x
57	39	9	89	59	Y	121	79	y
58	3a	:	90	5a	Z	122	7a	z
59	3b	;	91	5b	[	123	7b	{
60	3c	<	92	5c	\	124	7c	\|
61	3d	=	93	5d	]	125	7d	}
62	3e	>	94	5e	^	126	7e	~
63	3f	?	95	5f	_	127	7f	DEL

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