Description
The NOT (!) operator is used to reverse a logical value. That is, if a condition returns a TRUE, using NOT will change its value to FALSE, and vice versa.
Usage
!condition
| Argument | Type | Required | Description |
|---|---|---|---|
| condition | Boolean | Yes | The condition to negate |
Examples
If you have a form with an optional text field with the code REGISTRATION_NUMBER, you could add a field "Registration authority" with the relevance rule:
!ISBLANK(REGISTRATION_NUMBER)
In this case, the registration authority field will only be displayed if a registration number is provided.