Definition:ASCII
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Definition
ASCII is an acronym for the American Standard Code for Information Interchange.
It is a binary code for converting common typographical symbols into a sequence of $7$ bits.
| Code | Decimal | Hexadecimal | Symbol | Meaning | Code | Decimal | Hexadecimal | Symbol | Code | Decimal | Hexadecimal | Symbol | Code | Decimal | Hexadecimal | Symbol |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| $\text {000 0000}$ | $0$ | $0$ | $\texttt {NUL}$ | Null | $\text {010 0000}$ | $32$ | $20$ | (space) | $\text {100 0000}$ | $64$ | $40$ | $@$ | $\text {110 0000}$ | $96$ | $\text {60}$ | ` |
| $\text {000 0001}$ | $1$ | $1$ | $\texttt {SOH}$ | Start of Heading | $\text {010 0001}$ | $33$ | $21$ | $\texttt !$ | $\text {100 0001}$ | $65$ | $\text {41}$ | $\texttt A$ | $\text {110 0001}$ | $97$ | $\text {61}$ | $\texttt a$ |
| $\text {000 0010}$ | $2$ | $2$ | $\texttt {STX}$ | Start of Text | $\text {010 0010}$ | $34$ | $22$ | $\texttt "$ | $\text {100 0010}$ | $66$ | $\text {42}$ | $\texttt B$ | $\text {110 0010}$ | $98$ | $\text {62}$ | $\texttt b$ |
| $\text {000 0011}$ | $3$ | $3$ | $\texttt {ETX}$ | End of Text | $\text {010 0011}$ | $35$ | $23$ | $\texttt #$ | $\text {100 0011}$ | $67$ | $\text {43}$ | $\texttt C$ | $\text {110 0011}$ | $99$ | $\text {63}$ | $\texttt c$ |
| $\text {000 0100}$ | $4$ | $4$ | $\texttt {EOT}$ | End of Transmission | $\text {010 0100}$ | $36$ | $24$ | $\$ $ | $\text {100 0100}$ | $68$ | $\text {44}$ | $\texttt D$ | $\text {110 0100}$ | $100$ | $\text {64}$ | $\texttt d$ |
| $\text {000 0101}$ | $5$ | $5$ | $\texttt {ENQ}$ | Enquiry | $\text {010 0101}$ | $37$ | $25$ | $\texttt %$ | $\text {100 0101}$ | $69$ | $\text {45}$ | $\texttt E$ | $\text {110 0101}$ | $101$ | $\text {65}$ | $\texttt e$ |
| $\text {000 0110}$ | $6$ | $6$ | $\texttt {ACK}$ | Acknowledge | $\text {010 0110}$ | $38$ | $26$ | $\texttt &$ | $\text {100 0110}$ | $70$ | $\text {46}$ | $\texttt F$ | $\text {110 0110}$ | $102$ | $\text {66}$ | $\texttt f$ |
| $\text {000 0111}$ | $7$ | $7$ | $\texttt {BEL}$ | Bell | $\text {010 0111}$ | $39$ | $27$ | $\texttt '$ | $\text {100 0111}$ | $71$ | $\text {47}$ | $\texttt G$ | $\text {110 0111}$ | $103$ | $\text {67}$ | $\texttt g$ |
| $\text {000 1000}$ | $8$ | $8$ | $\texttt {BS}$ | Backspace | $\text {010 1000}$ | $40$ | $28$ | $\texttt ($ | $\text {100 1000}$ | $72$ | $\text {48}$ | $\texttt H$ | $\text {110 1000}$ | $104$ | $\text {68}$ | $\texttt h$ |
| $\text {000 1001}$ | $9$ | $9$ | $\texttt {TAB}$ | Horizontal Tab | $\text {010 1001}$ | $41$ | $29$ | $\texttt )$ | $\text {100 1001}$ | $73$ | $\text {49}$ | $\texttt I$ | $\text {110 1001}$ | $105$ | $\text {69}$ | $\texttt i$ |
| $\text {000 1010}$ | $10$ | $\text A$ | $\texttt {LF}$ | NL: Line Feed, New Line | $\text {010 1010}$ | $42$ | $\text {2A}$ | $\texttt *$ | $\text {100 1010}$ | $74$ | $\text {4A}$ | $\texttt J$ | $\text {110 1010}$ | $106$ | $\text {6A}$ | $\texttt j$ |
| $\text {000 1011}$ | $11$ | $\text B$ | $\texttt {VT}$ | Vertical Tab | $\text {010 1011}$ | $43$ | $\text {2B}$ | $\texttt +$ | $\text {100 1011}$ | $75$ | $\text {4B}$ | $\texttt K$ | $\text {110 1011}$ | $107$ | $\text {6B}$ | $\texttt k$ |
| $\text {000 1100}$ | $12$ | $\text C$ | $\texttt {FF}$ | NP: Form Feed, New Page | $\text {010 1100}$ | $44$ | $\text {2C}$ | $\texttt ,$ | $\text {100 1100}$ | $76$ | $\text {4C}$ | $\texttt L$ | $\text {110 1100}$ | $108$ | $\text {6C}$ | $\texttt l$ |
| $\text {000 1101}$ | $13$ | $\text D$ | $\texttt {CR}$ | Carriage Return | $\text {010 1101}$ | $45$ | $\text {2D}$ | $\texttt -$ | $\text {100 1101}$ | $77$ | $\text {4D}$ | $\texttt M$ | $\text {110 1101}$ | $109$ | $\text {6D}$ | $\texttt m$ |
| $\text {000 1110}$ | $14$ | $\text E$ | $\texttt {SO}$ | Shift Out | $\text {010 1110}$ | $46$ | $\text {2E}$ | $\texttt .$ | $\text {100 1110}$ | $78$ | $\text {4E}$ | $\texttt N$ | $\text {110 1110}$ | $110$ | $\text {6E}$ | $\texttt n$ |
| $\text {000 1111}$ | $15$ | $\text F$ | $\texttt {SI}$ | Shift In | $\text {010 1111}$ | $47$ | $\text {2F}$ | $\texttt /$ | $\text {100 1111}$ | $79$ | $\text {4F}$ | $\texttt O$ | $\text {110 1111}$ | $111$ | $\text {6F}$ | $\texttt o$ |
| $\text {001 0000}$ | $16$ | $10$ | $\texttt {DLE}$ | Data Link Escape | $\text {011 0000}$ | $48$ | $\text {30}$ | $\texttt 0$ | $\text {101 0000}$ | $80$ | $\text {50}$ | $\texttt P$ | $\text {111 0000}$ | $112$ | $\text {70}$ | $\texttt p$ |
| $\text {001 0001}$ | $17$ | $11$ | $\texttt {DC1}$ | Device Control 1 | $\text {011 0001}$ | $49$ | $\text {31}$ | $\texttt 1$ | $\text {101 0001}$ | $81$ | $\text {51}$ | $\texttt Q$ | $\text {111 0001}$ | $113$ | $\text {71}$ | $\texttt q$ |
| $\text {001 0010}$ | $18$ | $12$ | $\texttt {DC2}$ | Device Control 2 | $\text {011 0010}$ | $50$ | $\text {32}$ | $\texttt 2$ | $\text {101 0010}$ | $82$ | $\text {52}$ | $\texttt R$ | $\text {111 0010}$ | $114$ | $\text {72}$ | $\texttt r$ |
| $\text {001 0011}$ | $19$ | $13$ | $\texttt {DC3}$ | Device Control 3 | $\text {011 0011}$ | $51$ | $\text {33}$ | $\texttt 3$ | $\text {101 0011}$ | $83$ | $\text {53}$ | $\texttt S$ | $\text {111 0011}$ | $115$ | $\text {73}$ | $\texttt s$ |
| $\text {001 0100}$ | $20$ | $14$ | $\texttt {DC4}$ | Device Control 4 | $\text {011 0100}$ | $52$ | $\text {34}$ | $\texttt 4$ | $\text {101 0100}$ | $84$ | $\text {54}$ | $\texttt T$ | $\text {111 0100}$ | $116$ | $\text {74}$ | $\texttt t$ |
| $\text {001 0101}$ | $21$ | $15$ | $\texttt {NAK}$ | Negative Acknowledge | $\text {011 0101}$ | $53$ | $\text {35}$ | $\texttt 5$ | $\text {101 0101}$ | $85$ | $\text {55}$ | $\texttt U$ | $\text {111 0101}$ | $117$ | $\text {75}$ | $\texttt u$ |
| $\text {001 0110}$ | $22$ | $16$ | $\texttt {SYN}$ | Synchronous Idle | $\text {011 0110}$ | $54$ | $\text {36}$ | $\texttt 6$ | $\text {101 0110}$ | $86$ | $\text {56}$ | $\texttt V$ | $\text {111 0110}$ | $118$ | $\text {76}$ | $\texttt v$ |
| $\text {001 0111}$ | $23$ | $17$ | $\texttt {ETB}$ | End of Transmission Block | $\text {011 0111}$ | $55$ | $\text {37}$ | $\texttt 7$ | $\text {101 0111}$ | $87$ | $\text {57}$ | $\texttt W$ | $\text {111 0111}$ | $119$ | $\text {77}$ | $\texttt w$ |
| $\text {001 1000}$ | $24$ | $18$ | $\texttt {CAN}$ | Cancel | $\text {011 1000}$ | $56$ | $\text {38}$ | $\texttt 8$ | $\text {101 1000}$ | $88$ | $\text {58}$ | $\texttt X$ | $\text {111 1000}$ | $120$ | $\text {78}$ | $\texttt x$ |
| $\text {001 1001}$ | $25$ | $\text {19}$ | $\texttt {EM}$ | End of Medium | $\text {011 1001}$ | $57$ | $\text {39}$ | $\texttt 9$ | $\text {101 1001}$ | $89$ | $\text {59}$ | $\texttt Y$ | $\text {111 1001}$ | $121$ | $\text {79}$ | $\texttt y$ |
| $\text {001 1010}$ | $26$ | $\text {1A}$ | $\texttt {SUB}$ | Substitute | $\text {011 1010}$ | $58$ | $\text {3A}$ | $\texttt :$ | $\text {101 1010}$ | $90$ | $\text {5A}$ | $\texttt Z$ | $\text {111 1010}$ | $122$ | $\text {7A}$ | $\texttt z$ |
| $\text {001 1011}$ | $27$ | $\text {1B}$ | $\texttt {ESC}$ | Escape | $\text {011 1011}$ | $59$ | $\text {3B}$ | $\texttt ;$ | $\text {101 1011}$ | $91$ | $\text {5B}$ | $\texttt [$ | $\text {111 1011}$ | $123$ | $\text {7B}$ | $\texttt \{$ |
| $\text {001 1100}$ | $28$ | $\text {1C}$ | $\texttt {FS}$ | File Separator | $\text {011 1100}$ | $60$ | $\text {3C}$ | $\texttt <$ | $\text {101 1100}$ | $92$ | $\text {5C}$ | $\texttt {\ }$ | $\text {111 1100}$ | $124$ | $\text {7C}$ | $\vert$ |
| $\text {001 1101}$ | $29$ | $\text {1D}$ | $\texttt {GS}$ | Group Separator | $\text {011 1101}$ | $61$ | $\text {3D}$ | $\texttt =$ | $\text {101 1101}$ | $93$ | $\text {5D}$ | $\texttt ]$ | $\text {111 1101}$ | $125$ | $\text {7D}$ | $\texttt \}$ |
| $\text {001 1110}$ | $30$ | $\text {1E}$ | $\texttt {RS}$ | Record Separator | $\text {011 1110}$ | $62$ | $\text {3E}$ | $\texttt >$ | $\text {101 1110}$ | $94$ | $\text {5E}$ | $\texttt ^$ | $\text {111 1110}$ | $126$ | $\text {7E}$ | $\texttt ~$ |
| $\text {001 1111}$ | $31$ | $\text {1F}$ | $\texttt {US}$ | Unit Separator | $\text {011 1111}$ | $63$ | $\text {3F}$ | $\texttt ?$ | $\text {101 1111}$ | $95$ | $\text {5F}$ | $\texttt _$ | $\text {111 1111}$ | $127$ | $\text {7F}$ | $\texttt {DEL}$ |
Also see
- Results about ASCII can be found here.
Sources
- 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): ASCII
- 2014: Christopher Clapham and James Nicholson: The Concise Oxford Dictionary of Mathematics (5th ed.) ... (previous) ... (next): ASCII
- 2021: Richard Earl and James Nicholson: The Concise Oxford Dictionary of Mathematics (6th ed.) ... (previous) ... (next): ASCII (American Standard Code for Information Interchange)