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**#ASSERT( **//condition //[, //message// ] **)**

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| **#ASSERT** | Evaluates assumptions to detect unexpected errors. |
| //condition// | An expression that should always evaluate as true. |
| //message// | A string constant containing the text to display if the //condition// is not true. If omitted, the text of the //condition// is displayed. |

**#ASSERT** evaluates assumptions to detect unexpected errors. #ASSERT evaluates the //condition// expression and displays the //message// if the //condition// is not true. This allows you to test the veracity of any programming assumptions you are making at any point in your template code.

**Example:**

**#ASSERT****(%False)                    #!Displays '%False'**

**#ASSERT****(%False, 'Message Text')    #!Displays 'Message Text'**