Description
Extract one packed bit as a Boolean.
Bit positions are usually counted from the least-significant bit, while a displayed binary string has its own left-to-right indexing convention. Masks, fields and parity predicates describe a selected region or pattern; local agreement does not validate a complete encoded record.
Extract one packed bit as a Boolean.
When to use this tool
Use Bitword Extract One Packed Bit when checking the stated mask, field, parity or bit-index convention.
How to use the tool and how it works
- Enter word, index, width. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read bit. Inspect bit before interpreting the associated values.
Extract one packed bit as a Boolean. Require width 1..128, valid zero-based index and bounded exact word; bit is true when word AND 2^index is nonzero.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| word | Word | Required. Text; maximum UTF-16 length 8192. Integer syntax: optional + or - and 1-128 decimal digits; leading zeros accepted. Apply the sign restriction above. |
| index | Position under the explicit indexing convention; inspect any missing-value sentinel. | Required. Safe integer; minimum 0. |
| width | Width under the stated bit, interval or geometry convention; apply the field-specific units and bounds. | Required. Safe integer; minimum 1; maximum 128. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| bit | Bit | Required. Boolean. |
{
"input": {
"word": "9",
"index": 3,
"width": 8
},
"output": {
"bit": true
}
}Limitations and assumptions
- Index zero is least significant; no byte order, memory access or multi-bit field is processed.
- 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
Choose an explicit bit order, word width and missing-position policy; use the complete record format and appropriate parsing or checksum methods for full validation.
References
Similar or alternative tools
- Bitword Deposit One Bit Position
Write one Boolean bit into a bounded word.
- Bitword Lsb Msb Index Crosswalk
Crosswalk a bit index between least/most-significant numbering.