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Co-authored-by: archer <archer@archerdeMac-mini.local>
Co-authored-by: archer <545436317@qq.com>
2026-02-26 22:14:30 +08:00

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---
title: Conditional (IF/ELSE)
description: FastGPT Conditional module overview
---
## Features
- Can be added multiple times
- Has external inputs
- Trigger-based execution
![](/imgs/judgement1.png)
## Function
Performs an `IF` evaluation on any variable. If the condition is met, the `IF` branch executes; otherwise the `ELSE` branch runs.
In the example above, if the "Knowledge Base Citation" variable has a length of 0, the `IF` branch executes; otherwise the `ELSE` branch runs.
You can add more conditions and branches, following the same logic as `IF` statements in programming languages.
## Use Cases
Common scenarios include: having the LLM make a judgment and then output fixed content, or checking the LLM's response to decide whether to trigger downstream modules.