# 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.

**logical**- A value or logical expression that can be evaluated as TRUE or FALSE.

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

- When
**logical**is FALSE, NOT returns TRUE. - 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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