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# value(forKeyPath:)

Returns the value for the derived property identified by a given key path.

```
func value(forKeyPath keyPath: String) -> Any?
```

## Parameters

`keyPath`

A key path of the form relationship.property (with one or more relationships); for example “department.name” or “department.manager.lastName”.

## Return Value

The value for the derived property identified by `keyPath`.

## Discussion

The default implementation gets the destination object for each relationship using [`value(forKey:)`](/documentation/ObjectiveC/NSObject-swift.class/value(forKey:)) and returns the result of a [`value(forKey:)`](/documentation/ObjectiveC/NSObject-swift.class/value(forKey:)) message to the final object.

## See Also

[`setValue(_:forKeyPath:)`](/documentation/ObjectiveC/NSObject-swift.class/setValue(_:forKeyPath:))

Sets the value for the property identified by a given key path to a given value.


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