HTML ASCII 参考

ASCII was the first character set (encoding standard) used

between computers on the Internet.

Both ISO-8859-1 (default in HTML 4.01) and UTF-8 (default in

HTML5), are built on ASCII.

The ASCII Character Set

ASCII stands for the "American Standard Code for Information Interchange".

It was designed in the early 60's, as a standard character set for computers

and electronic devices.

ASCII is a 7-bit character set containing 128 characters.

It contains the numbers from 0-9, the upper and lower case English letters

from A to Z, and some special characters.

The character sets used in modern computers, in HTML, and on the Internet,

are all based on ASCII.

The following tables list the 128 ASCII characters and their equivalent

number.

ASCII Printable Characters

Char

Number

Description

0 - 31

Control characters (see below)

32

space

!

33

exclamation mark

"

34

quotation mark

#

35

number sign

$

36

dollar sign

%

37

percent sign

&

38

ampersand

'

39

apostrophe

(

40

left parenthesis

)

41

right parenthesis

*

42

asterisk

+

43

plus sign

,

44

comma

-

45

hyphen

.

46

period

/

47

slash

0

48

digit 0

1

49

digit 1

2

50

digit 2

3

51

digit 3

4

52

digit 4

5

53

digit 5

6

54

digit 6

7

55

digit 7

8

56

digit 8

9

57

digit 9

:

58

colon

;

59

semicolon

<

60

less-than

=

61

equals-to

>

62

greater-than

?

63

question mark

@

64

at sign

A

65

uppercase A

B

66

uppercase B

C

67

uppercase C

D

68

uppercase D

E

69

uppercase E

F

70

uppercase F

G

71

uppercase G

H

72

uppercase H

I

73

uppercase I

J

74

uppercase J

K

75

uppercase K

L

76

uppercase L

M

77

uppercase M

N

78

uppercase N

O

79

uppercase O

P

80

uppercase P

Q

81

uppercase Q

R

82

uppercase R

S

83

uppercase S

T

84

uppercase T

U

85

uppercase U

V

86

uppercase V

W

87

uppercase W

X

88

uppercase X

Y

89

uppercase Y

Z

90

uppercase Z

[

91

left square bracket

\

92

backslash

]

93

right square bracket

^

94

caret

_

95

underscore

`

96

grave accent

a

97

lowercase a

b

98

lowercase b

c

99

lowercase c

d

100

lowercase d

e

101

lowercase e

f

102

lowercase f

g

103

lowercase g

h

104

lowercase h

i

105

lowercase i

j

106

lowercase j

k

107

lowercase k

l

108

lowercase l

m

109

lowercase m

n

110

lowercase n

o

111

lowercase o

p

112

lowercase p

q

113

lowercase q

r

114

lowercase r

s

115

lowercase s

t

116

lowercase t

u

117

lowercase u

v

118

lowercase v

w

119

lowercase w

x

120

lowercase x

y

121

lowercase y

z

122

lowercase z

{

123

left curly brace

|

124

vertical bar

}

125

right curly brace

~

126

tilde

ASCII Device Control Characters

The ASCII control characters (range 00-31, plus 127) were designed to control

hardware devices.

Control characters (except horizontal tab, line feed, and carriage return)

have nothing to do inside an HTML document.

Char

Number

Description

NUL

00

null character

SOH

01

start of header

STX

02

start of text

ETX

03

end of text

EOT

04

end of transmission

ENQ

05

enquiry

ACK

06

acknowledge

BEL

07

bell (ring)

BS

08

backspace

HT

09

horizontal tab

LF

10

line feed

VT

11

vertical tab

FF

12

form feed

CR

13

carriage return

SO

14

shift out

SI

15

shift in

DLE

16

data link escape

DC1

17

device control 1

DC2

18

device control 2

DC3

19

device control 3

DC4

20

device control 4

NAK

21

negative acknowledge

SYN

22

synchronize

ETB

23

end transmission block

CAN

24

cancel

EM

25

end of medium

SUB

26

substitute

ESC

27

escape

FS

28

file separator

GS

29

group separator

RS

30

record separator

US

31

unit separator

DEL

127

delete (rubout)