The Foreach control flow action iterates over an array list. Within a Foreach control flow action, you can have one or more groups of actions, which can be executed in each item of the array.

By default, the Foreach control flow action can run 50 concurrent threads on array items. Logic Apps provides concurrency control for the processing of the Foreach action. You can also control the number of item lists within a Foreach loop using the filter condition on the array:

In this example, we have used a recurrence scheduled trigger along with Compose and a Foreach loop. In the Compose action, we have constructed a JSON array containing various hardcoded user sentiments. Compose actions are used to construct message shapes (such as transform and message assignment in BizTalk).

You can use the Compose action to build a dynamic or static message in a Logic Apps workflow and use them within subsequent sequential or parallel actions.

To control the degree of parallelism and concurrency in a Foreach loop, you can set the value within the Logic Apps designer through the Foreach action settings. You can also refer to the code view to manage concurrency control as shown here: