Chapter 3. Character Set

The ASCII character set contains the control and graphic characters shown in the following table. Numbers, letters, and special characters in the character set are identified by the letter "C" in the Notes column. All other characters are members of the auxiliary character set. The letter "A" identifies the characters that belong to the Fortran character set as defined by the standard. Letters in parentheses following the descriptions in the Description column indicate the following control character usage:

Table 3-1. Character set

Character

Octal

Decimal

Hex

Notes

Description

NUL

000

000

00

 

Null

SOH

001

001

01

 

Start of heading (CC)

STX

002

002

02

 

Start of text (CC)

ETX

003

003

03

 

End of text (CC)

EOT

004

004

04

 

End of transmission (CC)

ENQ

005

005

05

 

Enquiry (CC)

ACK

006

006

06

 

Acknowledge (CC)

BEL

007

007

07

 

Bell (audible signal)

BS

010

008

08

 

Backspace (FE)

HT

011

009

09

C

Horizontal tabulation (FE)

LF

012

010

0A

 

Line feed (FE)

VT

013

011

0B

 

Vertical tabulation (FE)

FF

014

012

0C

 

Form feed (FE)

CR

015

013

0D

 

Carriage return (FE)

SO

016

014

0E

 

Shift out

SI

017

015

0F

 

Shift in

DLE

020

016

10

 

Data link escape (CC)

DC1

021

017

11

 

Device control 1

DC2

022

018

12

 

Device control 2

DC3

023

019

13

 

Device control 3

DC4

024

020

14

 

Device control 4 (stop)

NAK

025

021

15

 

Negative acknowledge (CC)

SYN

026

022

16

 

Synchronous idle (CC)

ETB

027

023

17

 

End of transmission block (CC)

CAN

030

024

18

 

Cancel

EM

031

025

19

 

End of medium

SUB

032

026

1A

 

Substitute

ESC

033

027

1B

 

Escape

FS

034

028

1C

 

File separator (IS)

GS

035

029

1D

 

Group separator (IS)

RS

036

030

1E

 

Record separator (IS)

US

037

031

1F

 

Unit separator (IS)

space

040

032

20

A, C

(blank)

!

041

033

21

A, C

Exclamation point

"

042

034

22

A, C

Quotation mark

#

043

035

23

 

Number sign

$

044

036

24

A, C

Dollar sign (currency symbol)

%

045

037

25

A, C

Percent

&

046

038

26

A, C

Ampersand

'

047

039

27

A, C

Apostrophe (single quote)

(

050

040

28

A, C

Opening (left) parenthesis

)

051

041

29

A, C

Closing (right) parenthesis

*

052

042

2A

A, C

Asterisk

+

053

043

2B

A, C

Plus

,

054

044

2C

A, C

Comma (cedilla)

-

055

045

2D

A, C

Minus (hyphen)

.

056

046

2E

A, C

Period (decimal point)

/

057

047

2F

A, C

Slant (slash, virgule)

0

060

048

30

A, C

Zero

1

061

049

31

A, C

One

2

062

050

32

A, C

Two

3

063

051

33

A, C

Three

4

064

052

34

A, C

Four

5

065

053

35

A, C

Five

6

066

054

36

A, C

Six

7

067

055

37

A, C

Seven

8

070

056

38

A, C

Eight

9

071

057

39

A, C

Nine

:

072

058

3A

A, C

Colon

;

073

059

3B

A, C

Semicolon

<

074

060

3C

A, C

Less than

=

075

061

3D

A, C

Equal

>

076

062

3E

A, C

Greater than

?

077

063

3F

A, C

Question mark

@

100

064

40

C

"At" sign. Reserved for internal use. Not a valid character on IRIX systems.

A

101

065

41

A, C

Uppercase letter

B

102

066

42

A, C

Uppercase letter

C

103

067

43

A, C

Uppercase letter

D

104

068

44

A, C

Uppercase letter

E

105

069

45

A, C

Uppercase letter

F

106

070

46

A, C

Uppercase letter

G

107

071

47

A, C

Uppercase letter

H

110

072

48

A, C

Uppercase letter

I

111

073

49

A, C

Uppercase letter

J

112

074

4A

A, C

Uppercase letter

K

113

075

4B

A, C

Uppercase letter

L

114

076

4C

A, C

Uppercase letter

M

115

077

4D

A, C

Uppercase letter

N

116

078

4E

A, C

Uppercase letter

O

117

079

4F

A, C

Uppercase letter

P

120

080

50

A, C

Uppercase letter

Q

121

081

51

A, C

Uppercase letter

R

122

082

52

A, C

Uppercase letter

S

123

083

53

A, C

Uppercase letter

T

124

084

54

A, C

Uppercase letter

U

125

085

55

A, C

Uppercase letter

V

126

086

56

A, C

Uppercase letter

W

127

087

57

A, C

Uppercase letter

X

130

088

58

A, C

Uppercase letter

Y

131

089

59

A, C

Uppercase letter

Z

132

090

5A

A, C

Uppercase letter

{

133

091

5B

 

Opening (left) brace

\

134

092

5C

 

Reverse slant (backslash)

}

135

093

5D

 

Closing (right) brace

^

136

094

5E

 

Caret (circumflex)

_

137

095

5F

A, C

Underline

`

140

096

60

 

Grave accent

a

141

097

61

A, C

Lowercase letter

b

142

098

62

A, C

Lowercase letter

c

143

099

63

A, C

Lowercase letter

d

144

100

64

A, C

Lowercase letter

e

145

101

65

A, C

Lowercase letter

f

146

102

66

A, C

Lowercase letter

g

147

103

67

A, C

Lowercase letter

h

150

104

68

A, C

Lowercase letter

i

151

105

69

A, C

Lowercase letter

j

152

106

6A

A, C

Lowercase letter

k

153

107

6B

A, C

Lowercase letter

l

154

108

6C

A, C

Lowercase letter

m

155

109

6D

A, C

Lowercase letter

n

156

110

6E

A, C

Lowercase letter

o

157

111

6F

A, C

Lowercase letter

p

160

112

70

A, C

Lowercase letter

q

161

113

71

A, C

Lowercase letter

r

162

114

72

A, C

Lowercase letter

s

163

115

73

A, C

Lowercase letter

t

164

116

74

A, C

Lowercase letter

u

165

117

75

A, C

Lowercase letter

v

166

118

76

A, C

Lowercase letter

w

167

119

77

A, C

Lowercase letter

x

170

120

78

A, C

Lowercase letter

y

171

121

79

A, C

Lowercase letter

z

172

122

7A

A, C

Lowercase letter

[

173

123

7B

 

Opening (left) bracket

|

174

124

7C

 

Vertical line

]

175

125

7D

 

Closing (right) bracket

~

176

126

7E

 

Overline (tilde, general accent)

DEL

177

127

7F

 

Delete