The syntax of the Not function is:
where the supplied logical argument must be a logical or numeric value.
Note that, if the supplied logical argument is a numeric value, zero is treated as the logical value FALSE and any other numeric value is treated as the logical value TRUE.
The following spreadsheet shows examples of the Excel Not Function.
Note that the example in cell A3 of the above spreadsheet uses the Excel Isblank function with the Not function, to test if cell B1 is blank.
For further details and examples of the Excel Not function, see the Microsoft Office website.
If you get an error from the Excel Not function, this is likely to be the #VALUE! error:
|#VALUE!||-||Occurs if the supplied argument is not a logical or numeric value.|