Description
Map 0-32 to Unicode points U+2400+octet and 127 to U+2421; return point and its symbol.
Control characters can be displayed using visible Unicode pictures or caret notation. These representations show a control value to a reader; they are not the original bytes or instructions to execute terminal behavior.
Map 0-32 to Unicode points U+2400+octet and 127 to U+2421; return point and its symbol.
When to use this tool
Use Ascii Control Picture Code Point when producing a visible representation of one supported ASCII control value.
How to use the tool and how it works
- Enter octet. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read point, symbol. Use the output convention below.
Require whole octet in [0,32] or exactly 127. Map 0-32 to Unicode points U+2400+octet and 127 to U+2421; return point and its symbol.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| octet | Octet | Required. Safe integer; minimum 0; maximum 127. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| point | Point | Required. Safe integer. |
| symbol | Symbol | Required. Text; maximum UTF-16 length 8192. |
{
"input": {
"octet": 0
},
"output": {
"point": 9216,
"symbol": "␀"
}
}Limitations and assumptions
- ASCII space maps to its control-picture symbol too. The output is a visible representation, not the original control byte, terminal behavior or a sanitization guarantee.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use actual byte encoding or an appropriate escaping policy when transmitting data rather than displaying a control label.
References
Similar or alternative tools
- Encoding: Ascii Control Caret Token
Return ^? for 127; otherwise prepend a caret to the character at asciiCode+64.
- uuencode Value To Symbol Tool
Compute uuencode value to symbol from explicit bounded inputs.