for/while loop in workflow

[YingchaoX]

Self Checks

• [X] I have searched for existing issues search for existing issues, including closed ones.
• [X] I confirm that I am using English to submit this report (我已阅读并同意 Language Policy).
• [X] Pleas do not modify this template :) and fill in all the required fields.

1. Is this request related to a challenge you're experiencing?

now i need to repeat the llm node again and again

2. Describe the feature you'd like to see

for loop or while loop in workflow

3. How will this feature improve your workflow or experience?

i don't know to repeat the llm node again and again

4. Additional context or comments

No response

5. Can you help us with this feature?

• [X] I am interested in contributing to this feature.

[mkaskov]

as I understood Duplicated https://github.com/langgenius/dify/issues/3634 but what is the status and deadline?

[VincePotato]

Hi，We're designing a new node in the dify workflow called "iteration." Its purpose is to perform multiple steps on a list object until all results are outputted.

You can use this node for generating long texts, like first having an LLM create a story outline based on a user-inputted theme, then feeding the outline list into the Iteration and LLM nodes for multiple iterations until a complete story is generated.

The Iteration node allows the AI workflow to handle more complex processing logic. This feature is coming soon in our recent version.

[VincePotato]

The while loop node will be supported later, probably in June.

[TianzeWang]

Hi Vince @VincePotato

I am wondering will Dify support the while loop with unknown array length?

I have a scenario that, I want to have multiple round of conversation with LLM and finally rate the conversations with LLM. The # of rounds of conversation is not fixed #. I hope this could be achieved with some logic like:

While (! flag A) { Conversation with LLM; flag A = Decide flag A is entered by user?;} Then {Move to next node}