# Flow block in Amazon Connect: Loop
<a name="loop"></a>

This topic defines the flow block for counting the number of times that customers are looped through the **Looping** branch.

## Description
<a name="loop-description"></a>
+ Loops over the same blocks for the configured number through the **Looping** branch.
+ After the loop is completed, the **Complete** branch is followed. 
+ If the provided input is incorrect, the **Error** branch is followed.
+ This block is often used with a **Get customer input** block. For example, if the customer doesn't succeed in entering their account number, you can loop to give them another opportunity to enter it. 

## Supported channels
<a name="loop-channels"></a>

The following table lists how this block routes a contact who is using the specified channel. 


| Channel | Supported? | 
| --- | --- | 
|  Voice  |  Yes  | 
|  Chat  |  Yes  | 
|  Task  |  Yes  | 
|  Email  |  Yes  | 

## Flow types
<a name="loop-types"></a>

You can use this block in the following [flow types](create-contact-flow.md#contact-flow-types):
+ All flows

## Properties
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 The following image shows the **Properties** page of the **Loop** block. It is configured to repeat three times, and then it branches. 

![\[The properties page of the Loop block.\]](http://docs.aws.amazon.com/connect/latest/adminguide/images/set number of loops.png)


In the **Select an action** dropdown, choose from the following options:
+ Set number of loops
+ Set array for looping

## Set number of loops
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![\[alt text not found\]](http://docs.aws.amazon.com/connect/latest/adminguide/images/set number of loops highlight.png)


When select an action is set to “Set number of loops”, note the following properties:
+ The loop block will loop over for the specified count
+ If the provided input is not a valid number, error branch is taken
+ If Loop Name is provided, you can access the current index through \$1.Loop.<yourLoopName>.Index, starts from 0

## Set array for looping
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![\[alt text not found\]](http://docs.aws.amazon.com/connect/latest/adminguide/images/set array for looping.png)


When select an action is set to “Set array for looping”, note the following properties : 
+ You can provide an array or list to loop through each element in the loop block
+ The block will loop for the number of elements in the input
+ Loop name is required to loop over an array
+ You can access the following with the Loop Name
  + \$1.Loop.<yourLoopName>.Index - Current Index, starts from 0
  + \$1.Loop.<yourLoopName>.Element - Current looping element
  + \$1.Loop.<yourLoopName>.Elements - The provided input Array
+ Error branch is taken if invalid array is provided

## Configuration tips
<a name="loop-tips"></a>
+ If you enter 0 for the loop count, the **Complete** branch is followed the first time this block runs.
+ If a loop name is provided, it must be unique i.e. no other loop should be active with the same loop name.

## Configured block
<a name="loop-configured"></a>

The following image shows an example of what this block looks like when it is configured. It has three branches: **Looping**, **Complete**, and **Error** .

![\[A configured Loop block.\]](http://docs.aws.amazon.com/connect/latest/adminguide/images/new loop block.png)