> For the complete documentation index, see [llms.txt](https://max-daunarovich.gitbook.io/flow-network/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://max-daunarovich.gitbook.io/flow-network/introduction/composite-types/resources/resource-destructors.md).

# Resource Destructors

Resource may have a destructor, which is executed when the resource is destroyed. Destructors have no parameters and no return value and are declared using the `destroy` name. A resource may have only one destructor.

```
var destructorCalled = false

pub resource Resource {

    // Declare a destructor for the resource, which is executed
    // when the resource is destroyed.
    //
    destroy() {
        destructorCalled = true
    }
}

let res <- create Resource()
destroy res
// `destructorCalled` is `true`
```