ASCII CodeThe ASCII stands for American Standard Code for Information Interchange. The ASCII code is an alphanumeric code used for data communication in digital computers. The ASCII is a 7-bit code capable of representing 27 or 128 number of different characters. The ASCII code is made up of a three-bit group, which is followed by a four-bit code. - The ASCII Code is a 7 or 8-bit alphanumeric code.
- This code can represent 127 unique characters.
- The ASCII code starts from 00h to 7Fh. In this, the code from 00h to 1Fh is used for control characters, and the code from 20h to 7Fh is used for graphic symbols.
- The 8-bit code holds ASCII, which supports 256 symbols where math and graphic symbols are added.
- The range of the extended ASCII is 80h to FFh.
The ASCII characters are classified into the following groups: Control CharactersThe non-printable characters used for sending commands to the PC or printer are known as control characters. We can set tabs, and line breaks functionality by this code. The control characters are based on telex technology. Nowadays, it's not so much popular in use. The character from 0 to 31 and 127 comes under control characters. Special CharactersAll printable characters that are neither numbers nor letters come under the special characters. These characters contain technical, punctuation, and mathematical characters with space also. The character from 32 to 47, 58 to 64, 91 to 96, and 123 to 126 comes under this category. Numbers CharactersThis category of ASCII code contains ten Arabic numerals from 0 to 9. Letters CharactersIn this category, two groups of letters are contained, i.e., the group of uppercase letters and the group of lowercase letters. The range from 65 to 90 and 97 to 122 comes under this category. ASCII TableThe values are typically represented in ASCII code tables in decimal, binary, and hexadecimal form. Binary | Hexadecimal | Decimal | ASCII Symbol | Description | Group |
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0000000 | 0 | 0 | NUL | The null character encourage the device to do nothing | Control Character | 0000001 | 1 | 1 | SOH | The symbol SOH(Starts of heading) Initiates the header. | Control Character | 0000010 | 2 | 2 | STX | The symbol STX(Start of Text) ends the header and marks the beginning of a message. | Control Character | 0000011 | 3 | 3 | ETX | The symbol ETX(End of Text) indicates the end of the message. | Control Character | 0000100 | 4 | 4 | EOT | The EOT(end of text) symbol marks the end of a completes transmission | Control Character | 0000101 | 5 | 5 | ENQ | The ENQ(Enquiry) symbol is a request that requires a response | Control Character | 0000110 | 6 | 6 | ACK | The ACK(Acknowledge) symbol is a positive answer to the request. | Control Character | 0000111 | 7 | 7 | BEL | The BEL(Bell) symbol triggers a beep. | Control Character | 0001000 | 8 | 8 | BS | Lets the cursor move back one step (Backspace) | Control Character | 0001001 | 9 | 9 | TAB (HT) | A horizontal tab that moves the cursor within a row to the next predefined position (Horizontal Tab) | Control Character | 0001010 | A | 10 | LF | Causes the cursor to jump to the next line (Line Feed) | Control Character | 0001011 | B | 11 | VT | The vertical tab lets the cursor jump to a predefined line (Vertical Tab) | Control Character | 0001100 | C | 12 | FF | Requests a page break (Form Feed) | Control Character | 0001101 | D | 13 | CR | Moves the cursor back to the first position of the line (Carriage Return) | Control Character | 0001110 | E | 14 | SO | Switches to a special presentation (Shift Out) | Control Character | 0001111 | F | 15 | SI | Switches the display back to the normal state (Shift In) | Control Character | 0010000 | 10 | 16 | DLE | Changes the meaning of the following characters (Data Link Escape) | Control Character | 0010001 | 11 | 17 | DC1 | Control characters assigned depending on the device used (Device Control) | Control Character | 0010010 | 12 | 18 | DC2 | Control characters assigned depending on the device used (Device Control) | Control Character | 0010011 | 13 | 19 | DC3 | Control characters assigned depending on the device used (Device Control) | Control Character | 0010100 | 14 | 20 | DC4 | Control characters assigned depending on the device used (Device Control) | Control Character | 0010101 | 15 | 21 | NAK | The negative response to a request (Negative Acknowledge) | Control Character | 0010110 | 16 | 22 | SYN | Synchronizes a data transfer, even if no signals are transmitted (Synchronous Idle) | Control Character | 0010111 | 17 | 23 | ETB | Marks the end of a transmission block (End of Transmission Block) | Control Character | 0011000 | 18 | 24 | CAN | Makes it clear that transmission was faulty and the data must be discarded (Cancel) | Control Character | 0011001 | 19 | 25 | EM | Indicates the end of the storage medium (End of Medium) | Control Character | 0011010 | 1A | 26 | SUB | Replacement for a faulty sign (Substitute) | Control Character | 0011011 | 1B | 27 | ESC | Initiates an escape sequence and thus gives the following characters a special meaning (Escape) | Control Character | 0011100 | 1C | 28 | FS | File separator. | Control Character | 0011101 | 1D | 29 | GS | Group separator. | Control Character | 0011110 | 1E | 30 | RS | Record separator. | Control Character | 0011111 | 1F | 31 | US | Unit separator. | Control Character | 0100000 | 20 | 32 | SP | Blank space | Special Character | 0100001 | 21 | 33 | ! | Exclamation mark | Special Character | 0100010 | 22 | 34 | | Only quotes above | Special Character | 0100011 | 23 | 35 | # | Pound sign | Special Character | 0100100 | 24 | 36 | $ | Dollar sign | Special Character | 0100101 | 25 | 37 | % | Percentage sign | Special Character | 0100110 | 26 | 38 | & | Commercial and | Special Character | 0100111 | 27 | 39 | | Apostrophe | Special Character | 0101000 | 28 | 40 | ( | Left bracket | Special Character | 0101001 | 29 | 41 | ) | Right bracket | Special Character | 0101010 | 2A | 42 | * | Asterisk | Special Character | 0101011 | 2B | 43 | + | Plus symbol | Special Character | 0101100 | 2C | 44 | , | Comma | Special Character | 0101101 | 2D | 45 | - | Dash | Special Character | 0101110 | 2E | 46 | . | Full stop | Special Character | 0101111 | 2F | 47 | / | Forward slash | Special Character | 0110000 | 30 | 48 | 0 | | Numbers | 0110001 | 31 | 49 | 1 | | Numbers | 0110010 | 32 | 50 | 2 | | Numbers | 0110011 | 33 | 51 | 3 | | Numbers | 0110100 | 34 | 52 | 4 | | Numbers | 0110101 | 35 | 53 | 5 | | Numbers | 0110110 | 36 | 54 | 6 | | Numbers | 0110111 | 37 | 55 | 7 | | Numbers | 0111000 | 38 | 56 | 8 | | Numbers | 0111001 | 39 | 57 | 9 | | Numbers | 0111010 | 3A | 58 | : | Colon | Special characters | 0111011 | 3B | 59 | ; | Semicolon | Special characters | 0111100 | 3C | 60 | < | Small than bracket | Special characters | 0111101 | 3D | 61 | = | Equals sign | Special characters | 0111110 | 3E | 62 | > | Bigger than symbol | Special characters | 0111111 | 3F | 63 | ? | Question mark | Special characters | 1000000 | 40 | 64 | @ | At symbol | Special characters | 1000001 | 41 | 65 | A | | Capital letters | 1000010 | 42 | 66 | B | | Capital letters | 1000011 | 43 | 67 | C | | Capital letters | 1000100 | 44 | 68 | D | | Capital letters | 1000101 | 45 | 69 | E | | Capital letters | 1000110 | 46 | 70 | F | | Capital letters | 1000111 | 47 | 71 | G | | Capital letters | 1001000 | 48 | 72 | H | | Capital letters | 1001001 | 49 | 73 | I | | Capital letters | 1001010 | 4A | 74 | J | | Capital letters | 1001011 | 4B | 75 | K | | Capital letters | 1001100 | 4C | 76 | L | | Capital letters | 1001101 | 4D | 77 | M | | Capital letters | 1001110 | 4E | 78 | N | | Capital letters | 1001111 | 4F | 79 | O | | Capital letters | 1010000 | 50 | 80 | P | | Capital letters | 1010001 | 51 | 81 | Q | | Capital letters | 1010010 | 52 | 82 | R | | Capital letters | 1010011 | 53 | 83 | S | | Capital letters | 1010100 | 54 | 84 | T | | Capital letters | 1010101 | 55 | 85 | U | | Capital letters | 1010110 | 56 | 86 | V | | Capital letters | 1010111 | 57 | 87 | W | | Capital letters | 1011000 | 58 | 88 | X | | Capital letters | 1011001 | 59 | 89 | Y | | Capital letters | 1011010 | 5A | 90 | Z | | Capital letters | 1011011 | 5B | 91 | [ | Left square bracket | Special character | 1011100 | 5C | 92 | \ | Inverse/backward slash | Special character | 1011101 | 5D | 93 | ] | Right square bracket | Special character | 1011110 | 5E | 94 | ^ | Circumflex | Special character | 1011111 | 5F | 95 | _ | Underscore | Special character | 1100000 | 60 | 96 | ` | Gravis (backtick) | Special character | 1100001 | 61 | 97 | A | | Lowercase letters | 1100010 | 62 | 98 | B | | Lowercase letters | 1100011 | 63 | 99 | C | | Lowercase letters | 1100100 | 64 | 100 | D | | Lowercase letters | 1100101 | 65 | 101 | E | | Lowercase letters | 1100110 | 66 | 102 | F | | Lowercase letters | 1100111 | 67 | 103 | G | | Lowercase letters | 1101000 | 68 | 104 | H | | Lowercase letters | 1101001 | 69 | 105 | I | | Lowercase letters | 1101010 | 6A | 106 | J | | Lowercase letters | 1101011 | 6B | 107 | K | | Lowercase letters | 1101100 | 6C | 108 | L | | Lowercase letters | 1101101 | 6D | 109 | M | | Lowercase letters | 1101110 | 6E | 110 | N | | Lowercase letters | 1101111 | 6F | 111 | O | | Lowercase letters | 1110000 | 70 | 112 | P | | Lowercase letters | 1110001 | 71 | 113 | Q | | Lowercase letters | 1110010 | 72 | 114 | R | | Lowercase letters | 1110011 | 73 | 115 | S | | Lowercase letters | 1110100 | 74 | 116 | T | | Lowercase letters | 1110101 | 75 | 117 | U | | Lowercase letters | 1110110 | 76 | 118 | v | | Lowercase letters | 1110111 | 77 | 119 | w | | Lowercase letters | 1111000 | 78 | 120 | x | | Lowercase letters | 1111001 | 79 | 121 | y | | Lowercase letters | 1111010 | 7A | 122 | z | | Lowercase letters | 1111011 | 7B | 123 | { | Left curly bracket | Special characters | 1111100 | 7C | 124 | l | Vertical line | Special characters | 1111101 | 7D | 125 | } | Right curly brackets | Special characters | 1111110 | 7E | 126 | ~ | Tilde | Special characters | 1111111 | 7F | 127 | DEL | The DEL(Delete) symbol deletes a character. This is a control character that consists of the same number in all positions. | Control characters |
Example 1: (10010101100001111011011000011010100111000011011111101001 110111011101001000000011000101100100110011)2Step 1: In the first step, we we make the groups of 7-bits because the ASCII code is 7 bit. 1001010 1100001 1110110 1100001 1010100 1110000 1101111 1101001 1101110 1110100 1000000 0110001 0110010 0110011 Step 2: Then, we find the equivalent decimal number of the binary digits either from the ASCII table or 64 32 16 8 4 2 1 scheme. Binary | Decimal |
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64 32 16 8 4 2 1 1 0 0 1 0 1 0 | 64+8+2=74 | 64 32 16 8 4 2 1 1 1 0 0 0 0 1 | 64+32+1=94 | 64 32 16 8 4 2 1 1 1 1 0 1 1 0 | 64+32+16+4+2=118 | 64 32 16 8 4 2 1 1 1 0 0 0 0 1 | 64+32+1=97 | 64 32 16 8 4 2 1 1 0 1 0 1 0 0 | 64+16+4=84 | 64 32 16 8 4 2 1 1 1 1 0 0 0 0 | 64+32+16=112 | 64 32 16 8 4 2 1 1 1 0 1 1 1 1 | 64+32+8+4+2+1=111 | 64 32 16 8 4 2 1 1 1 0 1 0 0 1 | 64+32+8+1=105 | 64 32 16 8 4 2 1 1 1 0 1 1 1 0 | 64+32+8+4+2=110 | 64 32 16 8 4 2 1 1 1 1 0 1 0 0 | 64+32+16+4=116 | 64 32 16 8 4 2 1 1 0 0 0 0 0 0 | 64 | 64 32 16 8 4 2 1 0 1 1 0 0 0 1 | 32+16+1=49 | 64 32 16 8 4 2 1 0 1 1 0 0 1 0 | 32+16+2=50 | 64 32 16 8 4 2 1 0 1 1 0 0 1 1 | 32+16+2+1=51 |
Step 3: Last, we find the equivalent symbol of the decimal number from the ASCII table. Decimal | Symbol |
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74 | J | 94 | a | 118 | v | 97 | a | 84 | T | 112 | p | 111 | o | 105 | i | 110 | n | 116 | t | 64 | @ | 49 | 1 | 50 | 2 | 51 | 3 |
ASCII Code: JavaTpoint@123
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