How to trigger child flow in Power Automate- Pass Input Parameter to Flow

How to trigger another flow in Power Automate

In Power Automate there are two ways to trigger one another flow like child flow.

1. Instant HTTP Trigger

2. Instant Child Flow

1. Instant HTTP Flow

    I. Create a Instant HTTP Flow (Child Flow)

1.     Add one or two actions in that flow and save it.
2.     It will generate an HTTP Post Url.
3.     If you want to accept the input from the parent flow, then you need to upload the schema.
4. 
5.     To Provide response back to the Parent Flow use the Response action at the last of the flow.
6. 
7.     click on the 'Use sample payload to generate schema' option in trigger.
8.     upload the schema (Json Format).
9.     Click on save button to save flow.

II. Create Parent Flow 

    1. Add action Http 

    2. Select the method 'Post'

    3. Paste the child flow Trigger Url.

    4. Provide the input in Json format in Body.

    5. Click on save. 

6. Use Compose to display the response.

7. Now run the flow.

2. Instant Child Flow

1.     Create a Instant Flow - Manually Trigger a flow
2.     Add Input in Trigger to accept the input From parent Flow.
3.     
4. 
5.     Perform Your operations in child flow
6.     Use Respond to PowerApps or Flow action to send response back to parent flow.
7.     Now go to the Parent Flow.
8.     Use 'Run a child flow' action.
9.     select child flow
10.     Provide input to child flow from parent flow.
11. 
12. Now run the Flow and see the response.
13. 
    
14. 
15. In this using two way we can call the Child Flow.

    

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