# Negation - !expr

| Condition            | Value                                                              |
| -------------------- | ------------------------------------------------------------------ |
| Released in version: | 1.0.14                                                             |
| Flutter/Dart link:   | <https://dart.dev/guides/language/language-tour#logical-operators> |

<figure><img src="/files/1sy4Q6GLkds2eVhf3Umw" alt=""><figcaption><p>Negation - !expr default node</p></figcaption></figure>

The "Negation - !expr" node is a logical node used to negate (or invert) the value of a boolean. Therefore if the current value is true, the result is false, and if the value is false, the result is true.&#x20;

Check the table below with the results of this node:

| Item1 | Result |
| :---: | :----: |
| False |  True  |
|  True |  False |

#### Inputs

<table><thead><tr><th>Input Name</th><th width="150" data-type="checkbox">Canvas Required</th><th width="150">Type</th><th>Description</th></tr></thead><tbody><tr><td>value</td><td>true</td><td>Bool</td><td>Value to apply negation</td></tr></tbody></table>

#### Outputs

<table><thead><tr><th width="208.57142857142856">Output Name</th><th width="150" data-type="checkbox">Canvas Required</th><th width="150">Type</th><th>Description</th></tr></thead><tbody><tr><td>result</td><td>true</td><td>Bool</td><td>Result from applying the negation operator to "value" input</td></tr></tbody></table>


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