The ASCII Character Set

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Myles Alban Henderson
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1 The ASCII Character Set The American Standard Code for Information Interchange or ASCII assigns values between 0 and 255 for upper and lower case letters, numeric digits, punctuation marks and other symbols. ASCII characters can be split into the following sections: 0 31 Control codes Standard, implementation-independent characters Special symbols, international character sets generally, non-standard characters. Control Codes : ASCII Characters 0-31 The following table lists and describes the first 32 ASCII characters, often referred to as control codes. The columns show the decimal and hexadecimal ASCII values for each code along with their abbreviated and full names. Descriptions are given to those most in use today. Decimal Octal Hexadecimal Code Description NUL Null SOH Start Of Heading STX Start of TeXt ETX End of TeXt EOT End Of Transmission ENQ ENQuiry ACK ACKnowledge Table continued on following page

ASCII characters can be split into the following sections: 0 31 Control codes 32 127 Standard, implementation-independent characters 128 255 Special symbols, international character sets generally,

2 Appendix F Decimal Octal Hexadecimal Code Description BEL BELl. Caused teletype machines to ring a bell. Causes a beep in many common terminals and terminal emulation programs BS BackSpace. Moves the cursor move backwards (left) one space HT Horizontal Tab. Moves the cursor right to the next tab stop. The spacing of tab stops is dependent on the output device, but is often either 8 or 10 characters wide A LF Line Feed. Moves the cursor to a new line. On Unix systems, moves to a new line AND all the way to the left B VT Vertical Tab C FF Form Feed. Advances paper to the top of the next page (if the output device is a printer) D CR Carriage Return. Moves the cursor all the way to the left, but does not advance to the next line E SO Shift Out F SI Shift In DLE Data Link Escape DC1 Device Control DC2 Device Control DC3 Device Control DC4 Device Control NAK Negative AcKnowledge SYN SYNchronous idle ETB End of Transmission Block CAN CANcel EM End of Medium A SUB SUBstitute B ESC ESCape C FS File Separator 586

The spacing of tab stops is dependent on the output device, but is often either 8 or 10 characters wide. 010 012 0A LF Line Feed. Moves the cursor to a new line.

3 The ASCII Character Set Decimal Octal Hexadecimal Code Description D GS Group Separator E RS Record Separator F US Unit Separator The Standard ASCII Characters : ASCII Characters are the standard, implementation-independent alphanumeric characters we work with every day. The tables below show the characters along with both their decimal and hexadecimal ASCII values. Characters The first table, which contains characters 32-64, contains the majority of the standard symbolic characters and the numbers from zero to nine Space ! " # $ % & ' ( ) A : A * B ; B C < C, D = D E > E F? F /

The tables below show the characters along with both their decimal and hexadecimal ASCII values.

4 Appendix F Characters The second table, which contains characters , contains the standard Latin alphabet characters both lower and upper case, separated only by a few characters at and A a B b C c D d E e F f G g H h I i A J A j B K B k C L C l D M D m E N E n F O F o P p Q q R r S s T t U u V v W w X x Y y A Z A z 588

065 101 41 A 097 141 61 a 066 102 42 B 098 142 62 b 067 103 43 C 099 143 63 c 068 104 44 D 100 144 64 d 069 105 45 E 101 145 65 e 070 106 46 F 102 146 66 f 071 107 47 G 103 147 67 g 072 110 48 H 104

5 The ASCII Character Set B [ B { C \ C D ] D } E ^ E ~ F _ F delete ' The Non-Standard ASCII Characters : The second half of the ASCII table holds the non-standard extension set of characters which may vary depending which computer system you may be using. One common but in no way definitive example of this extended set is as follows. Characters This first table contains characters , abstract symbols that appear in text from time to time A0 nonbreaking space A A ƒ A A A A A ˆ A A A Š AA ª B AB «Table continued on following page 589

One common but in no way definitive example of this extended set is as follows. Characters 128-191 This first table contains characters 128-191, abstract symbols that appear in text from time to time.

6 Appendix F C Œ AC D AD E Ž AE F AF B ' B1 ± ' B2 ² " B3 ³ B B5 µ B B B B9 ¹ A š BA º B BB» C œ BC ¼ D BD ½ E Ÿ BE ¾ F Ÿ BF Characters The second table contains characters , variously accented alphabetical characters C0 À E0 à C1 Á E1 á C2 Â E2 â C3 Ã E3 ã C4 Ä E4 ä 590

º 155 233 9B 187 273 BB» 156 234 9C œ 188 274 BC ¼ 157 235 9D 189 275 BD ½ 158 236 9E Ÿ 190 276 BE ¾ 159 237 9F Ÿ 191 277 BF Characters 192-255 The second table contains characters

7 The ASCII Character Set C5 Å E5 å C6 Æ E6 æ C7 Ç E7 ç C8 È E8 è C9 É E9 é CA Ê EA ê CB Ë EB ë CC Ì EC ì CD Í ED í CE Î EE î CF Ï EF ï D0 Ð F0 ð D1 Ñ F1 ñ D2 Ò F2 ò D3 Ó F3 ó D4 Ô F4 ô D5 Ö F5 õ D6 Ö F6 ö D F D8 Ø F8 ø D9 Ù F9 ù DA Ú FA ú DB Û FB û DC Ü FC ü DD Ý FD ý DE Þ FE þ DF ß FF 591

ñ 210 322 D2 Ò 242 362 F2 ò 211 323 D3 Ó 243 363 F3 ó 212 324 D4 Ô 244 364 F4 ô 213 325 D5 Ö 245 365 F5 õ 214 326 D6 Ö 246 366 F6 ö 215 327 D7 247 367 F7 216 330 D8 Ø 248 370 F8 ø

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ASCII control characters (character code 0-31)

ASCII control characters (character code 0-31) DEC HEX 0 00 NUL Null char 1 01 SOH Start of Heading 2 02 STX Start of Text 3 03 ETX End of Text 4 04 EOT End of Transmission