ASCII is an acronym for American Standard Code for information interchange developed by the American National Standards Institute (ANSI). ASCII is the most common format to represent the text files.
In an ASCII file alphabetic, numeric or special characters is represent with 7-bit binary numbers. Since ASCII uses 7-bit, it only supports 2^7 = 128 character codes (0 to 127). Therefore, the standard ASCII character code set is limited to 128 characters.
There is an Extended ASCII set that supports 8-bit binary representation to hold some of the special characters and this extended set will represent character codes form 128 - 255.
ASCII Control Characters
Dec | Hex | Binary | Character | Description |
---|---|---|---|---|
0 | 00 | 00000000 | NUL | null |
1 | 01 | 00000001 | SOH | start of header |
2 | 02 | 00000010 | STX | start of text |
3 | 03 | 00000011 | ETX | end of text |
4 | 04 | 00000100 | EOT | end of transmission |
5 | 05 | 00000101 | ENQ | enquiry |
6 | 06 | 00000110 | ACK | acknowledge |
7 | 07 | 00000111 | BEL | bell |
8 | 08 | 00001000 | BS | backspace |
9 | 09 | 00001001 | HT | horizontal tab |
10 | 0A | 00001010 | LF | line feed |
11 | 0B | 00001011 | VT | vertical tab |
12 | 0C | 00001100 | FF | form feed |
13 | 0D | 00001101 | CR | enter / carriage return |
14 | 0E | 00001110 | SO | shift out |
15 | 0F | 00001111 | SI | shift in |
16 | 10 | 00010000 | DLE | data link escape |
17 | 11 | 00010001 | DC1 | device control 1 |
18 | 12 | 00010010 | DC2 | device control 2 |
19 | 13 | 00010011 | DC3 | device control 3 |
20 | 14 | 00010100 | DC4 | device control 4 |
21 | 15 | 00010101 | NAK | negative acknowledge |
22 | 16 | 00010110 | SYN | synchronize |
23 | 17 | 00010111 | ETB | end of trans. block |
24 | 18 | 00011000 | CAN | cancel |
25 | 19 | 00011001 | EM | end of medium |
26 | 1A | 00011010 | SUB | substitute |
27 | 1B | 00011011 | ESC | escape |
28 | 1C | 00011100 | FS | file separator |
29 | 1D | 00011101 | GS | group separator |
30 | 1E | 00011110 | RS | record separator |
31 | 1F | 00011111 | US | unit separator |
127 | 7F | 01111111 | DEL | delete |
ASCII Printable Characters
Dec | Hex | Binary | Char- acter |
Description |
---|---|---|---|---|
32 | 20 | 00100000 | Space | space |
33 | 21 | 00100001 | ! | exclamation mark |
34 | 22 | 00100010 | " | double quote |
35 | 23 | 00100011 | # | number |
36 | 24 | 00100100 | $ | dollar |
37 | 25 | 00100101 | % | percent |
38 | 26 | 00100110 | & | ampersand |
39 | 27 | 00100111 | ' | single quote |
40 | 28 | 00101000 | ( | left parenthesis |
41 | 29 | 00101001 | ) | right parenthesis |
42 | 2A | 00101010 | * | asterisk |
43 | 2B | 00101011 | + | plus |
44 | 2C | 00101100 | , | comma |
45 | 2D | 00101101 | - | minus |
46 | 2E | 00101110 | . | period |
47 | 2F | 00101111 | / | slash |
48 | 30 | 00110000 | 0 | zero |
49 | 31 | 00110001 | 1 | one |
50 | 32 | 00110010 | 2 | two |
51 | 33 | 00110011 | 3 | three |
52 | 34 | 00110100 | 4 | four |
53 | 35 | 00110101 | 5 | five |
54 | 36 | 00110110 | 6 | six |
55 | 37 | 00110111 | 7 | seven |
56 | 38 | 00111000 | 8 | eight |
57 | 39 | 00111001 | 9 | nine |
58 | 3A | 00111010 | : | colon |
59 | 3B | 00111011 | ; | semicolon |
60 | 3C | 00111100 | < | less than |
61 | 3D | 00111101 | = | equality sign |
62 | 3E | 00111110 | > | greater than |
63 | 3F | 00111111 | ? | question mark |
64 | 40 | 01000000 | @ | at sign |
65 | 41 | 01000001 | A | |
66 | 42 | 01000010 | B | |
67 | 43 | 01000011 | C | |
68 | 44 | 01000100 | D | |
69 | 45 | 01000101 | E | |
70 | 46 | 01000110 | F | |
71 | 47 | 01000111 | G | |
72 | 48 | 01001000 | H | |
73 | 49 | 01001001 | I | |
74 | 4A | 01001010 | J | |
75 | 4B | 01001011 | K | |
76 | 4C | 01001100 | L | |
77 | 4D | 01001101 | M | |
78 | 4E | 01001110 | N | |
79 | 4F | 01001111 | O | |
80 | 50 | 01010000 | P | |
81 | 51 | 01010001 | Q | |
82 | 52 | 01010010 | R | |
83 | 53 | 01010011 | S | |
84 | 54 | 01010100 | T | |
85 | 55 | 01010101 | U | |
86 | 56 | 01010110 | V | |
87 | 57 | 01010111 | W | |
88 | 58 | 01011000 | X | |
89 | 59 | 01011001 | Y | |
90 | 5A | 01011010 | Z | |
91 | 5B | 01011011 | [ | left square bracket |
92 | 5C | 01011100 | \ | backslash |
93 | 5D | 01011101 | ] | right square bracket |
94 | 5E | 01011110 | ^ | caret / circumflex |
95 | 5F | 01011111 | _ | underscore |
96 | 60 | 01100000 | ` | grave / accent |
97 | 61 | 01100001 | a | |
98 | 62 | 01100010 | b | |
99 | 63 | 01100011 | c | |
100 | 64 | 01100100 | d | |
101 | 65 | 01100101 | e | |
102 | 66 | 01100110 | f | |
103 | 67 | 01100111 | g | |
104 | 68 | 01101000 | h | |
105 | 69 | 01101001 | i | |
106 | 6A | 01101010 | j | |
107 | 6B | 01101011 | k | |
108 | 6C | 01101100 | l | |
109 | 6D | 01101101 | m | |
110 | 6E | 01101110 | n | |
111 | 6F | 01101111 | o | |
112 | 70 | 01110000 | p | |
113 | 71 | 01110001 | q | |
114 | 72 | 01110010 | r | |
115 | 73 | 01110011 | s | |
116 | 74 | 01110100 | t | |
117 | 75 | 01110101 | u | |
118 | 76 | 01110110 | v | |
119 | 77 | 01110111 | w | |
120 | 78 | 01111000 | x | |
121 | 79 | 01111001 | y | |
122 | 7A | 01111010 | z | |
123 | 7B | 01111011 | { | left curly bracket |
124 | 7C | 01111100 | | | vertical bar |
125 | 7D | 01111101 | } | right curly bracket |
126 | 7E | 01111110 | ~ | tilde |
127 | 7F | 01111111 | DEL | delete |
Extended ASCII Characters
Dec | Hex | Binary | Char- acter |
Description |
---|---|---|---|---|
128 | 80 | 10000000 | | |
129 | 81 | 10000001 | | |
130 | 82 | 10000010 | | |
131 | 83 | 10000011 | | |
132 | 84 | 10000100 | | |
133 | 85 | 10000101 | ||
134 | 86 | 10000110 | | |
135 | 87 | 10000111 | | |
136 | 88 | 10001000 | | |
137 | 89 | 10001001 | | |
138 | 8A | 10001010 | | |
139 | 8B | 10001011 | | |
140 | 8C | 10001100 | | |
141 | 8D | 10001101 | | |
142 | 8E | 10001110 | | |
143 | 8F | 10001111 | | |
144 | 90 | 10010000 | | |
145 | 91 | 10010001 | | |
146 | 92 | 10010010 | | |
147 | 93 | 10010011 | | |
148 | 94 | 10010100 | | |
149 | 95 | 10010101 | | |
150 | 96 | 10010110 | | |
151 | 97 | 10010111 | | |
152 | 98 | 10011000 | | |
153 | 99 | 10011001 | | |
154 | 9A | 10011010 | | |
155 | 9B | 10011011 | | |
156 | 9C | 10011100 | | |
157 | 9D | 10011101 | | |
158 | 9E | 10011110 | | |
159 | 9F | 10011111 | | |
160 | A0 | 10100000 | space | |
161 | A1 | 10100001 | ¡ | |
162 | A2 | 10100010 | ¢ | cent |
163 | A3 | 10100011 | £ | pound |
164 | A4 | 10100100 | ¤ | currency sign |
165 | A5 | 10100101 | ¥ | yen, yuan |
166 | A6 | 10100110 | ¦ | broken bar |
167 | A7 | 10100111 | § | section sign |
168 | A8 | 10101000 | ¨ | |
169 | A9 | 10101001 | © | copyright |
170 | AA | 10101010 | ª | ordinal indicator |
171 | AB | 10101011 | « | |
172 | AC | 10101100 | ¬ | |
173 | AD | 10101101 | | |
174 | AE | 10101110 | ® | registered trademark |
175 | AF | 10101111 | ¯ | |
176 | B0 | 10110000 | ° | degree |
177 | B1 | 10110001 | ± | plus-minus |
178 | B2 | 10110010 | ² | |
179 | B3 | 10110011 | ³ | |
180 | B4 | 10110100 | ´ | |
181 | B5 | 10110101 | µ | mu |
182 | B6 | 10110110 | ¶ | pilcrow |
183 | B7 | 10110111 | · | |
184 | B8 | 10111000 | ¸ | |
185 | B9 | 10111001 | ¹ | |
186 | BA | 10111010 | º | ordinal indicator |
187 | BB | 10111011 | » | |
188 | BC | 10111100 | ¼ | |
189 | BD | 10111101 | ½ | |
190 | BE | 10111110 | ¾ | |
191 | BF | 10111111 | ¿ | inverted question mark |
192 | C0 | 11000000 | À | |
193 | C1 | 11000001 | Á | |
194 | C2 | 11000010 | Â | |
195 | C3 | 11000011 | Ã | |
196 | C4 | 11000100 | Ä | |
197 | C5 | 11000101 | Å | |
198 | C6 | 11000110 | Æ | |
199 | C7 | 11000111 | Ç | |
200 | C8 | 11001000 | È | |
201 | C9 | 11001001 | É | |
202 | CA | 11001010 | Ê | |
203 | CB | 11001011 | Ë | |
204 | CC | 11001100 | Ì | |
205 | CD | 11001101 | Í | |
206 | CE | 11001110 | Î | |
207 | CF | 11001111 | Ï | |
208 | D0 | 11010000 | Ð | |
209 | D1 | 11010001 | Ñ | |
210 | D2 | 11010010 | Ò | |
211 | D3 | 11010011 | Ó | |
212 | D4 | 11010100 | Ô | |
213 | D5 | 11010101 | Õ | |
214 | D6 | 11010110 | Ö | |
215 | D7 | 11010111 | × | multiplication sign |
216 | D8 | 11011000 | Ø | |
217 | D9 | 11011001 | Ù | |
218 | DA | 11011010 | Ú | |
219 | DB | 11011011 | Û | |
220 | DC | 11011100 | Ü | |
221 | DD | 11011101 | Ý | |
222 | DE | 11011110 | Þ | |
223 | DF | 11011111 | ß | |
224 | E0 | 11100000 | à | |
225 | E1 | 11100001 | á | |
226 | E2 | 11100010 | â | |
227 | E3 | 11100011 | ã | |
228 | E4 | 11100100 | ä | |
229 | E5 | 11100101 | å | |
230 | E6 | 11100110 | æ | |
231 | E7 | 11100111 | ç | |
232 | E8 | 11101000 | è | |
233 | E9 | 11101001 | é | |
234 | EA | 11101010 | ê | |
235 | EB | 11101011 | ë | |
236 | EC | 11101100 | ì | |
237 | ED | 11101101 | í | |
238 | EE | 11101110 | î | |
239 | EF | 11101111 | ï | |
240 | F0 | 11110000 | ð | |
241 | F1 | 11110001 | ñ | |
242 | F2 | 11110010 | ò | |
243 | F3 | 11110011 | ó | |
244 | F4 | 11110100 | ô | |
245 | F5 | 11110101 | õ | |
246 | F6 | 11110110 | ö | |
247 | F7 | 11110111 | ÷ | obelus |
248 | F8 | 11111000 | ø | |
249 | F9 | 11111001 | ù | |
250 | FA | 11111010 | ú | |
251 | FB | 11111011 | û | |
252 | FC | 11111100 | ü | |
253 | FD | 11111101 | ý | |
254 | FE | 11111110 | þ | |
255 | FF | 11111111 | ÿ |