Formula (Extended): $NOT Function
## Overview
Return false if the argument is true.
## Syntax
```
$NOT(Logical Expression)
```
## Parameter
|Parameter|Type|Required|Description|
|:---|:---|:---|:---|
|Logical Expression|[Logical Expression](/en/manual/formula-function-logical-expression)|Required||
### Column Usable as Parameters
|Parameter|Classification|Numerical Value|Date|Description|Check|
|:---|:---|:---|:---|:---|:---|
|Logical expression|Yes*1|Yes*1|Yes*1|Yes*1|Yes|
*1: Can be used as a variable to configure the "[Logical Expression](/en/manual/formula-function-logical-expression)".
Example:
NumA == 1000
DateA > DateB
ClassA == "Text"
## Return Value
If the argument is true, false. Otherwise, true.
### Return Value for Target Column
|Target|Return Value|
|:---|:---|
|Classification (including title, status, manager, owner)|Display the string "True" or "False"|
|Numerical Value (including work volume, progression rate, remaining work volume)|Do not display|
|Date (including start and completion)|Do not display|
|Description (including content)|Display the string "True" or "False"|
|Check (including lock)|Check ON if true, check OFF if false|
## Usage Example ①
Specify parameters by screen column name (name displayed)
### Formula
![image](https://pleasanter.org/binaries/bf1f17e24417479697b70df8293431fd)
### Parameters
![image](https://pleasanter.org/binaries/b42ad2b501974b9893127807ccb71429)
### Calculation Result
![image](https://pleasanter.org/binaries/bc11d63b54d743858502551de4cfc118)
## Usage Example ②
Specify logical expression as parameter
### Formula
![image](https://pleasanter.org/binaries/09ef390045a342289cf410dc7954ac1d)
### Parameters
![image](https://pleasanter.org/binaries/d51b392c9f4f494c98e8c49a4e37ef75)
### Calculation Result
![image](https://pleasanter.org/binaries/08ec3ac3f0534c5fb4c9da1c1b6729d6)