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

# Go: Precondition

> CDKTN Core API Reference for Precondition in Go.

Terraform checks a precondition before evaluating the object it is associated with.

## Initializer <a name="Initializer" id="cdktn.Precondition.Initializer" />

```go theme={null}
import "github.com/open-constructs/cdk-terrain-go/cdktn"

&cdktn.Precondition {
	Condition: interface{},
	ErrorMessage: *string,
}
```

## Properties <a name="Properties" id="Properties" />

| **Name**                                                                          | **Type**                  | **Description**                                                                                                                    |
| --------------------------------------------------------------------------------- | ------------------------- | ---------------------------------------------------------------------------------------------------------------------------------- |
| <code><a href="#cdktn.Precondition.property.condition">Condition</a></code>       | <code>interface\{}</code> | This is a boolean expression that should return true if the intended assumption or guarantee is fulfilled or false if it does not. |
| <code><a href="#cdktn.Precondition.property.errorMessage">ErrorMessage</a></code> | <code>\*string</code>     | This contains the text that Terraform will include as part of error messages when it detects an unmet condition.                   |

***

### `Condition`<sup>Required</sup> <a name="Condition" id="cdktn.Precondition.property.condition" />

```go theme={null}
Condition interface{}
```

* *Type:* interface\{}

This is a boolean expression that should return true if the intended assumption or guarantee is fulfilled or false if it does not.

***

### `ErrorMessage`<sup>Required</sup> <a name="ErrorMessage" id="cdktn.Precondition.property.errorMessage" />

```go theme={null}
ErrorMessage *string
```

* *Type:* \*string

This contains the text that Terraform will include as part of error messages when it detects an unmet condition.

***