ASCII, the American Standard Code for Information Interchange, was developed in the 1960's as a standard 7-bit code for identifying letters, numbers, symbols, and special characters in the English language. It was later expanded (as Extended ASCII) to include additional symbols and foreign language characters.
Standard ASCII consists of 128 "characters", ranging from 0 to 127. They can be broken down into a few subgroups:
The chart includes the ASCII character or control and their related decimal and hexidecimal values. The control codes include their meaning, if known.
Dec | Hex | ASCII | Dec | Hex | ASCII | Dec | Hex | ASCII | Dec | Hex | ASCII | |||
0 | 0 | NUL (Null) | 32 | 20 | (Space) | 64 | 40 | @ | 96 | 60 | ` | |||
1 | 1 | SOH (Start of Header) | 33 | 21 | ! | 65 | 41 | A | 97 | 61 | a | |||
2 | 2 | STX (Start of Transaction) | 34 | 22 | " | 66 | 42 | B | 98 | 62 | b | |||
3 | 3 | ETX (End of Transaction) | 35 | 23 | # | 67 | 43 | C | 99 | 63 | c | |||
4 | 4 | EOT (End of Transmission) | 36 | 24 | $ | 68 | 44 | D | 100 | 64 | d | |||
5 | 5 | ENQ | 37 | 25 | % | 69 | 45 | E | 101 | 65 | e | |||
6 | 6 | ACK (Acknowledgement) | 38 | 26 | & | 70 | 46 | F | 102 | 66 | f | |||
7 | 7 | BEL (Bell) | 39 | 27 | ' | 71 | 47 | G | 103 | 67 | g | |||
8 | 8 | BS (Backspace) | 40 | 28 | ( | 72 | 48 | H | 104 | 68 | h | |||
9 | 9 | HT (Horizontal Tab) | 41 | 29 | ) | 73 | 49 | I | 105 | 69 | i | |||
10 | A | LF (Line Feed) | 42 | 2A | * | 74 | 4A | J | 106 | 6A | j | |||
11 | B | VT (Vertical Tab) | 43 | 2B | + | 75 | 4B | K | 107 | 6B | k | |||
12 | C | FF (Form Feed) | 44 | 2C | , | 76 | 4C | L | 108 | 6C | l | |||
13 | D | CR (Carriage Return) | 45 | 2D | - | 77 | 4D | M | 109 | 6D | m | |||
14 | E | SO | 46 | 2E | . | 78 | 4E | N | 110 | 6E | n | |||
15 | F | SI | 47 | 2F | / | 79 | 4F | O | 111 | 6F | o | |||
16 | 10 | DLE | 48 | 30 | 0 | 80 | 50 | P | 112 | 70 | p | |||
17 | 11 | DC1 | 49 | 31 | 1 | 81 | 51 | Q | 113 | 71 | q | |||
18 | 12 | DC2 | 50 | 32 | 2 | 82 | 52 | R | 114 | 72 | r | |||
19 | 13 | DC3 | 51 | 33 | 3 | 83 | 53 | S | 115 | 73 | s | |||
20 | 14 | DC4 | 52 | 34 | 4 | 84 | 54 | T | 116 | 74 | t | |||
21 | 15 | NAK (Negative Ack.) | 53 | 35 | 5 | 85 | 55 | U | 117 | 75 | u | |||
22 | 16 | SYN | 54 | 36 | 6 | 86 | 56 | V | 118 | 76 | v | |||
23 | 17 | ETB | 55 | 37 | 7 | 87 | 57 | W | 119 | 77 | w | |||
24 | 18 | CAN | 56 | 38 | 8 | 88 | 58 | X | 120 | 78 | x | |||
25 | 19 | EM | 57 | 39 | 9 | 89 | 59 | Y | 121 | 79 | y | |||
26 | 1A | SUB | 58 | 3A | : | 90 | 5A | Z | 122 | 7A | z | |||
27 | 1B | ESC (Escape) | 59 | 3B | ; | 91 | 5B | [ | 123 | 7B | { | |||
28 | 1C | FS | 60 | 3C | < | 92 | 5C | \ | 124 | 7C | | | |||
29 | 1D | GS | 61 | 3D | = | 93 | 5D | ] | 125 | 7D | } | |||
30 | 1E | RS | 62 | 3E | > | 94 | 5E | ^ | 126 | 7E | ~ | |||
31 | 1F | US | 63 | 3F | ? | 95 | 5F | _ | 127 | 7F | DEL (Delete) |