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# state

A dictionary of state information to be evaluated by the system’s rules.

```
var state: NSMutableDictionary { get }
```

## Discussion

This dictionary is mutable—some rules might alter the system’s state when executed. If you change this dictionary’s contents outside of a rule action, you must reset and reevaluate the system.

## See Also

[`reset()`](/documentation/GameplayKit/GKRuleSystem/reset())

Returns the rule system to its original agenda and clears all facts.

[`evaluate()`](/documentation/GameplayKit/GKRuleSystem/evaluate())

Evaluates the rule system, executing the list of rules in its agenda.


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