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Excel NOT Function

Excel NOT function

The Excel NOT function returns the opposite of a given logical or boolean value. When given TRUE, NOT returns FALSE.When given FALSE, NOT returns TRUE. Use the NOT function to reverse a logical value.

Reverse arguments or results
Return value 
A reversed logical value
=NOT (logical)
  • logical - A value or logical expression that can be evaluated as TRUE or FALSE.
Usage notes 

Use the NOT function to reverse a value or logical argument:

  1. When logical is FALSE, NOT returns TRUE.
  2. When logical is TRUE, NOT returns FALSE.

A common use case for NOT is to reverse the behavior of another function. For example, If the cell A1 is blank, then the formula =ISBLANK(A1) will return TRUE. NOT can be used to reverse this result to FALSE like this:


In essence, by adding NOT, you are able to create a formula that behaves like ISNOTBLANK, which doesn't exist in Excel.

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