# TransitionEvent
<a name="API_TransitionEvent"></a>

Specifies the actions performed and the next state entered when a `condition` evaluates to TRUE.

## Contents
<a name="API_TransitionEvent_Contents"></a>

 ** condition **   <a name="iotevents-Type-TransitionEvent-condition"></a>
Required. A Boolean expression that when TRUE causes the actions to be performed and the `nextState` to be entered.  
Type: String  
Length Constraints: Maximum length of 512.  
Required: Yes

 ** eventName **   <a name="iotevents-Type-TransitionEvent-eventName"></a>
The name of the transition event.  
Type: String  
Length Constraints: Maximum length of 128.  
Required: Yes

 ** nextState **   <a name="iotevents-Type-TransitionEvent-nextState"></a>
The next state to enter.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 128.  
Required: Yes

 ** actions **   <a name="iotevents-Type-TransitionEvent-actions"></a>
The actions to be performed.  
Type: Array of [Action](API_Action.md) objects  
Required: No

## See Also
<a name="API_TransitionEvent_SeeAlso"></a>

For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/iotevents-2018-07-27/TransitionEvent) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/iotevents-2018-07-27/TransitionEvent) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/iotevents-2018-07-27/TransitionEvent)