ISLOGICAL
Supported, behaves as documentedCategory: Information · Last tested 2026-07-04
Support matrix
| Engine | Documented | Live-tested | Verdict |
|---|---|---|---|
| Excel | Yes | Not yet | n/a |
| Google Sheets | Yes | Not yet | n/a |
| LibreOffice Calc | Yes | Yes (24.2.7.2, 2026-07-04) | Supported, behaves as documented |
Executed test cases
LibreOffice Calc 24.2.7.2 (tested 2026-07-04)
| Formula | Description | Result | Expected | Verdict |
|---|---|---|---|---|
| =ISLOGICAL(TRUE) | TRUE is a logical value -> TRUE | True | True | Matched |
| =ISLOGICAL(FALSE) | FALSE is a logical value -> TRUE | True | True | Matched |
| =ISLOGICAL(A1) | A plain number is not a logical value -> FALSE | False | False Even though 1 and TRUE are arithmetically interchangeable, ISLOGICAL distinguishes the underlying boolean type from a number. |
Matched |
| =ISLOGICAL(A1) | Text is not a logical value -> FALSE | False | False The text string "TRUE" is text, not the boolean TRUE. |
Matched |
Docs & syntax
- Excel: official documentation
- Google Sheets: official documentation
- LibreOffice Calc: official documentation