# How to use Excel NOT Function

This Excel tutorial explains how to use the **NOT function** with syntax and examples.

## Excel NOT Function Description

The Excel NOT function returns the opposite to a supplied logical value.

That is,

- If supplied with the value TRUE, the Not function returns FALSE;
- If supplied with the value FALSE, the Not function returns TRUE.

## Excel Not Function Examples

The following spreadsheet shows examples of the Excel Not Function.

**Explanation: **Firstly, recall that NOT function returns the opposite to a supplied logical value

Cell A3 in the example above uses Excel Isblank function with the Not function, to test if cell B1 is blank.

## Syntax

The syntax for the NOT function in Microsoft Excel is:

NOT( logical_value )

### Arguments

- logical_value
- An expression that either evaluates to TRUE or FALSE. If used with an expression of TRUE, then FALSE is returned. If used with an expression of FALSE, then TRUE is returned.

## Returns

If the *logical_value* is TRUE, then the NOT function will return FALSE.

If the *logical_value* is FALSE, then the NOT function will return TRUE.

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.