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# setValue(_:forKeyPath:)

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

```
func setValue(_ value: Any?, forKeyPath keyPath: String)
```

## Parameters

`value`

The value for the property identified by `keyPath`.

`keyPath`

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

## Discussion

The default implementation of this method gets the destination object for each relationship using [`value(forKey:)`](/documentation/ObjectiveC/NSObject-swift.class/value(forKey:)), and sends the final object a [`setValue(_:forKey:)`](/documentation/ObjectiveC/NSObject-swift.class/setValue(_:forKey:)) message.

### Special Considerations

When using this method, and the destination object does not implement an accessor for the value, the default behavior is for that object to retain `value` rather than copy or assign `value`.

## See Also

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

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


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