ASCII Encoding Standards
ASCII Character Set
The ASCII character set includes standard characters such as letters, numbers, punctuation, and control characters. Each character is assigned a unique seven-bit binary code.
Decimal | Character | Description |
---|---|---|
0 | NUL | Null |
1 | SOH | Start of Header |
2 | STX | Start of Text |
3 | ETX | End of Text |
4 | EOT | End of Transmit |
5 | ENQ | Enquiry |
6 | ACK | Acknowledge |
7 | BEL | Bell |
8 | BS | Backspace |
9 | HT | Horizontal Tab |
10 | LF | Line Feed |
11 | VT | Vertical Tab |
12 | FF | Form Feed |
13 | CR | Carriage Return |
14 | SO | Shift Out |
15 | SI | Shift In |
… | … | … |
32 | (space) | Space |
33 | ! | Exclamation Mark |
34 | “ | Quotation Mark |
… | … | … |
65 | A | Uppercase A |
66 | B | Uppercase B |
… | … | … |
97 | a | Lowercase a |
98 | b | Lowercase b |
… | … | … |
127 | DEL | Delete |
ASCII Control Characters
In addition to printable characters, ASCII includes control characters for formatting and controlling devices. These include characters like carriage return and line feed.
Decimal | Character | Description |
---|---|---|
0 | NUL | Null |
1 | SOH | Start of Header |
2 | STX | Start of Text |
3 | ETX | End of Text |
4 | EOT | End of Transmit |
5 | ENQ | Enquiry |
6 | ACK | Acknowledge |
7 | BEL | Bell |
8 | BS | Backspace |
9 | HT | Horizontal Tab |
10 | LF | Line Feed |
11 | VT | Vertical Tab |
12 | FF | Form Feed |
13 | CR | Carriage Return |
14 | SO | Shift Out |
15 | SI | Shift In |
ASCII Extended Characters
While the original ASCII set comprises 128 characters, extended ASCII introduces an additional 128 characters, accommodating symbols and characters for different languages.
Decimal | Character | Description |
---|---|---|
128 | Ç | Latin Capital Letter C-cedilla |
129 | ü | Latin Small Letter U with Diaeresis |
130 | é | Latin Small Letter E with Acute |
131 | â | Latin Small Letter A with Circumflex |
132 | ä | Latin Small Letter A with Diaeresis |
133 | à | Latin Small Letter A with Grave |
134 | å | Latin Small Letter A with Ring Above |
… | … | … |
255 | ÿ | Latin Small Letter Y with Diaeresis |
ASCII Table
A comprehensive ASCII table organizes characters and their corresponding binary, decimal, and hexadecimal representations.
Decimal | 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 Transmit |
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 | 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 (oft. XON) |
18 | 12 | 00010010 | DC2 | Device Control 2 |
19 | 13 | 00010011 | DC3 | Device Control 3 (oft. XOFF) |
20 | 14 | 00010100 | DC4 | Device Control 4 |
21 | 15 | 00010101 | NAK | Negative Acknowledge |
22 | 16 | 00010110 | SYN | Synchronous Idle |
23 | 17 | 00010111 | ETB | End of Transmission 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 |
32 | 20 | 00100000 | (space) | Space |
33 | 21 | 00100001 | ! | Exclamation Mark |
34 | 22 | 00100010 | “ | Quotation Mark |
35 | 23 | 00100011 | # | Number Sign |
36 | 24 | 00100100 | $ | Dollar Sign |
37 | 25 | 00100101 | % | Percent Sign |
38 | 26 | 00100110 | & | Ampersand |
39 | 27 | 00100111 | ‘ | Apostrophe (Single Quote) |
40 | 28 | 00101000 | ( | Left Parenthesis |
41 | 29 | 00101001 | ) | Right Parenthesis |
42 | 2A | 00101010 | * | Asterisk |
43 | 2B | 00101011 | + | Plus Sign |
44 | 2C | 00101100 | , | Comma |
45 | 2D | 00101101 | – | Hyphen (Minus Sign) |
46 | 2E | 00101110 | . | Period (Full Stop) |
47 | 2F | 00101111 | / | Solidus (Slash) |
48 | 30 | 00110000 | 0 | Digit Zero |
49 | 31 | 00110001 | 1 | Digit One |
50 | 32 | 00110010 | 2 | Digit Two |
51 | 33 | 00110011 | 3 | Digit Three |
52 | 34 | 00110100 | 4 | Digit Four |
53 | 35 | 00110101 | 5 | Digit Five |
54 | 36 | 00110110 | 6 | Digit Six |
55 | 37 | 00110111 | 7 | Digit Seven |
56 | 38 | 00111000 | 8 | Digit Eight |
57 | 39 | 00111001 | 9 | Digit Nine |
58 | 3A | 00111010 | : | Colon |
59 | 3B | 00111011 | ; | Semicolon |
60 | 3C | 00111100 | < | Less Than (Angle Bracket, Left Pointing) |
61 | 3D | 00111101 | = | Equals Sign |
62 | 3E | 00111110 | > | Greater Than (Angle Bracket, Right Pointing) |
63 | 3F | 00111111 | ? | Question Mark |
64 | 40 | 01000000 | @ | At Sign |
65 | 41 | 01000001 | A | Uppercase A |
66 | 42 | 01000010 | B | Uppercase B |
67 | 43 | 01000011 | C | Uppercase C |
68 | 44 | 01000100 | D | Uppercase D |
69 | 45 | 01000101 | E | Uppercase E |
70 | 46 | 01000110 | F | Uppercase F |
71 | 47 | 01000111 | G | Uppercase G |
72 | 48 | 01001000 | H | Uppercase H |
73 | 49 | 01001001 | I | Uppercase I |
74 | 4A | 01001010 | J | Uppercase J |
75 | 4B | 01001011 | K | Uppercase K |
76 | 4C | 01001100 | L | Uppercase L |
77 | 4D | 01001101 | M | Uppercase M |
78 | 4E | 01001110 | N | Uppercase N |
79 | 4F | 01001111 | O | Uppercase O |
80 | 50 | 01010000 | P | Uppercase P |
81 | 51 | 01010001 | Q | Uppercase Q |
82 | 52 | 01010010 | R | Uppercase R |
83 | 53 | 01010011 | S | Uppercase S |
84 | 54 | 01010100 | T | Uppercase T |
85 | 55 | 01010101 | U | Uppercase U |
86 | 56 | 01010110 | V | Uppercase V |
87 | 57 | 01010111 | W | Uppercase W |
88 | 58 | 01011000 | X | Uppercase X |
89 | 59 | 01011001 | Y | Uppercase Y |
90 | 5A | 01011010 | Z | Uppercase Z |
91 | 5B | 01011011 | [ | Left Square Bracket |
92 | 5C | 01011100 | \ | Backslash |
93 | 5D | 01011101 | ] | Right Square Bracket |
94 | 5E | 01011110 | ^ | Caret (Circumflex Accent) |
95 | 5F | 01011111 | _ | Underscore |
96 | 60 | 01100000 | ` | Grave Accent |
97 | 61 | 01100001 | a | Lowercase a |
98 | 62 | 01100010 | b | Lowercase b |
99 | 63 | 01100011 | c | Lowercase c |
100 | 64 | 01100100 | d | Lowercase d |
101 | 65 | 01100101 | e | Lowercase e |
102 | 66 | 01100110 | f | Lowercase f |
103 | 67 | 01100111 | g | Lowercase g |
104 | 68 | 01101000 | h | Lowercase h |
105 | 69 | 01101001 | i | Lowercase i |
106 | 6A | 01101010 | j | Lowercase j |
107 | 6B | 01101011 | k | Lowercase k |
108 | 6C | 01101100 | l | Lowercase l |
109 | 6D | 01101101 | m | Lowercase m |
110 | 6E | 01101110 | n | Lowercase n |
111 | 6F | 01101111 | o | Lowercase o |
112 | 70 | 01110000 | p | Lowercase p |
113 | 71 | 01110001 | q | Lowercase q |
114 | 72 | 01110010 | r | Lowercase r |
115 | 73 | 01110011 | s | Lowercase s |
116 | 74 | 01110100 | t | Lowercase t |
117 | 75 | 01110101 | u | Lowercase u |
118 | 76 | 01110110 | v | Lowercase v |
119 | 77 | 01110111 | w | Lowercase w |
120 | 78 | 01111000 | x | Lowercase x |
121 | 79 | 01111001 | y | Lowercase y |
122 | 7A | 01111010 | z | Lowercase z |
123 | 7B | 01111011 | { | Left Curly Brace |
124 | 7C | 01111100 | | | Vertical Bar |
125 | 7D | 01111101 | } | Right Curly Brace |
126 | 7E | 01111110 | ~ | Tilde |
127 | 7F | 01111111 | DEL | Delete |
What is ASCII – A Complete Guide to Generating ASCII Code
The American Standard Code for Information Interchange, or ASCII, is a character encoding standard that has been a foundational element in computing for decades. It plays a crucial role in representing text and control characters in digital form.
Historical Background
ASCII has a rich history, dating back to its development in the early 1960s. Originating from telegraph code and Morse code, ASCII emerged as a standardized way to represent characters in computers, facilitating data interchange.
Importance in Computing
ASCII’s significance in computing lies in its universality. It provides a standardized method for encoding characters, allowing seamless communication and data exchange across diverse computing systems.
Table of Content
- ASCII Encoding Standards
- ASCII Representation
- ASCII in Computing
- ASCII Extended Sets
- ASCII vs. Unicode
- Practical Examples of ASCII
- Limitations of ASCII
- Handling Non-ASCII Characters