Here is the ASCII standard for translating the integer represented by 7 (usually out of 8) bits in memory to a specific character. Most of the integers from 0 through 31 represent special signals to the computer, rather than what you normally consider to be characters.
Decimal Hexi- ASCII Equivalent Definition Number decimal Character Control value Character ------------------------------------------------------------ 0 0 nul Ctrl-@ Null 1 1 soh Ctrl-A Start of heading 2 2 stx Ctrl-B Start of text 3 3 etx Ctrl-C End of text 4 4 eot Ctrl-D End of transmission 5 5 enq Ctrl-E Enquiry 6 6 ack Ctrl-F Acknowledge 7 7 bel Ctrl-G Bell 8 8 bs Ctrl-H Backspace 9 9 ht Ctrl-I Horizontal tab 10 0a nl Ctrl-J Line feed 11 0b vt Ctrl-K Vertical tab 12 0c ff Ctrl-L Form feed 13 0d cr Ctrl-M Carriage return 14 0e so Ctrl-N Shift out 15 0f si Ctrl-O Shift in 16 10 dle Ctrl-P Data link escape 17 11 dc1 Ctrl-Q Device control 1 18 12 dc2 Ctrl-R Device control 2 19 13 dc3 Ctrl-S Device control 3 20 14 dc4 Ctrl-T Device control 4 21 15 nak Ctrl-U Negative acknowledge 22 16 syn Ctrl-V Synchronous idle 23 17 etb Ctrl-W End of transmission 24 18 can Ctrl-X Cancel 25 19 em Ctrl-Y End of medium 26 1a sub Ctrl-Z Substitute 27 1b esc Ctrl-[ Escape 28 1c fs Ctrl-\ File separator 29 1d gs Ctrl-] Group separator 30 1e rs Ctrl-^ Record separator 31 1f us Ctrl-_ Unit separator 32 20 sp Space 33 21 ! 34 22 " 35 23 # 36 24 $ 37 25 % 38 26 & 39 27 ' Apostrophe 40 28 ( 41 29 ) 42 2a * 43 2b + 44 2c , Comma 45 2d - Minus 46 2e . Period 47 2f / Divide 48 30 0 49 31 1 50 32 2 51 33 3 52 34 4 53 35 5 54 36 6 55 37 7 56 38 8 57 39 9 58 3a : Colon 59 3b ; Semicolon 60 3c < 61 3d = 62 3e > 63 3f ? 64 40 @ At symbol 65 41 A 66 42 B 67 43 C 68 44 D 69 45 E 70 46 F 71 47 G 72 48 H 73 49 I 74 4a J 75 4b K 76 4c L 77 4d M 78 4e N 79 4f O 80 50 P 81 51 Q 82 52 R 83 53 S 84 54 T 85 55 U 86 56 V 87 57 W 88 58 X 89 59 Y 90 5a Z 91 5b [ 92 5c \ Backslash 93 5d ] 94 5e ^ circumflex 95 5f _ Underline 96 60 ` Backward Apostrophe 97 61 a 98 62 b 99 63 c 100 64 d 101 65 e 102 66 f 103 67 g 104 68 h 105 69 i 106 6a j 107 6b k 108 6c l 109 6d m 110 6e n 111 6f o 112 70 p 113 71 q 114 72 r 115 73 s 116 74 t 117 75 u 118 76 v 119 77 w 120 78 x 121 79 y 122 7a z 123 7b { 124 7c | Vertical line 125 7d } 126 7e ~ Tilde 127 7f del Delete
Maintained by John Mahaffy : jhm@cac.psu.edu