---
title: "not"
description: "Explore the 'not' evaluator for conditional logic when expressions evaluate to false. (Gitana 4.0)"
product: "Gitana"
version: "4.0"
url: "/documentation/gitana/4.0/developers/ui-dev/evaluators/not"
---

# not

If the contained condition evaluates to false.

```
{
    "evaluator": "not",
    "condition": {
        ...
    }
}
```