Introduction

You've mastered the fundamentals. Now we'll explore how to add intelligence to workflows through control structures and logic. Instead of simple linear flows, you'll create workflows that make decisions, handle multiple scenarios, loop through data, and manage errors gracefully.

The IF Node: Conditional Branching

The IF node evaluates conditions and routes data down different paths based on whether conditions are true or false.

Basic IF Node Structure

INPUT DATA
    ↓
[IF NODE: Check Condition]
    ↙          ↘
  TRUE        FALSE
    ↓            ↓
Action A    Action B

Condition Types

Type	Use Case	Example
Boolean	True/false values	Is customer active?
Number	Numeric comparisons	Order total > $100?
String	Text comparisons	Status = "pending"?
Date & Time	Date comparisons	Due date in past?

Multiple Conditions

The Switch Node: Multiple Path Routing

While IF handles binary decisions, Switch routes data to multiple paths based on various conditions.

Scenario	Use
2 outcomes	IF Node
3+ outcomes	Switch Node

The Merge Node: Combining Data

When workflows split into branches, Merge nodes bring them back together.

Mode	Behavior
Append	Combines all items
Merge By Fields	Matches by field
Wait	Waits for all branches

Loops and Batch Processing

The Split In Batches node divides large datasets into manageable chunks.

Error Handling

Production workflows must handle errors gracefully.

Node-Level Error Settings

Setting	Effect
Continue On Fail	Workflow continues despite error
Retry On Fail	Automatically retries operation
Max Retry	Number of retry attempts

Wait Node: Timing and Delays

The Wait node pauses workflow execution for specified time or until conditions are met.

Building Complex Logic Flows

Pattern 1: Multi-Stage Decision Tree

Intelligent Lead Router:

1. Webhook receives lead
2. IF: Company size > 500? → Flag as "Enterprise"
3. Switch: Route by industry (Tech/Healthcare/Finance)
4. IF: Budget > $50,000? → Assign to senior rep
5. Create lead in CRM
6. Notify assigned rep

Pattern 2: Parallel Processing

Order Fulfillment:

1. New order received
2. Split into 3 parallel branches:
   • Verify payment
   • Check inventory
   • Calculate shipping
3. Merge results
4. IF: All validations passed? → Proceed with fulfillment

Debugging Workflows

Practice Exercises

Key Takeaways

• IF nodes route data based on conditions
• Switch nodes handle multiple routing paths
• Merge nodes combine data from branches
• Error handling is essential for production
• Batch processing manages large datasets
• Test incrementally and handle edge cases

Looking Forward

Before proceeding to Week 2 (Chapters 6-10), complete the Practice Workbook exercises and take the Self-Evaluation Quiz. These ensure you've mastered the foundations before advancing to core skills.