> ## Documentation Index
> Fetch the complete documentation index at: https://docs.melonly.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Logic Utilities

> Learn how logic utility blocks change true or false values inside workflows.

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Logic Utilities change true or false values so your workflow can make the right decision.

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## Blocks

<Tabs>
  <Tab title="Not">
    ## Not

    The Not block inverts a boolean value.

    ### What Does It Do?

    The Not block takes a true or false input and returns the opposite value.

    <Card title="">
      **Input**

      * **Boolean**: A true or false value, or the output of another block that returns a boolean.

      **Output**

      * **Boolean**: The inverted value.
    </Card>
  </Tab>
</Tabs>

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