---
title: "Boolean"
slug: "boolean"
updated: 2024-05-04T18:29:38Z
published: 2024-05-04T18:29:38Z
canonical: "help.mail-and-deploy.com/boolean"
---

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

# Boolean

### General

Values of type *Boolean* can have either of two states: *True* or *False*. A detailed explanation of the data-type can be found in the  [Boolean Data-Type](https://learn.microsoft.com/en-us/dotnet/visual-basic/language-reference/data-types/boolean-data-type) article of the Visual Basic .NET language documentation.

### Constants

Constant boolean values are written by using the keywords *True* and *False*. The following expression returns the boolean value True:

          Mail & Deploy Expression

          

True

The following expression returns the boolean value False:

          Mail & Deploy Expression

          

True

### Operators

The following operators can be used with boolean values:

| Operator | Description |
| --- | --- |
| Not | This operator inverts the boolean value following the operator; *Not True* will therefore return *False* and *Not False* returns *True*. |
| And | This operator performs a logical *And* operation which will only return *True* if both values on either side of the operator are *True*. |
| Or | This operator performs a logical *Or* operation which will return *True* if at least one of the values on either side of the operator is *True*. |