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🎓 Learn n8n expressions with an interactive step-by-step tutorial for beginners

Lucas PeyrinLucas Peyrin
52053 views
2/3/2026
SEOWeb ScraperData ExtractionCheerioHTTP Request
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How it works

This template is an interactive, step-by-step tutorial designed to teach you the most important skill in n8n: using expressions to access and manipulate data.

If you know what JSON is but aren't sure how to pull a specific piece of information from one node and use it in another, this workflow is for you. It starts with a single "Source Data" node that acts as our filing cabinet, and then walks you through a series of lessons, each demonstrating a new technique for retrieving and transforming that data.

You will learn how to:

  1. Access a simple value from a previous node.
  2. Use n8n's built-in selectors like .last() and .first().
  3. Get a specific item from a list (Array).
  4. Drill down into nested data (Objects).
  5. Combine these techniques to access data in an array of objects.
  6. Go beyond simple retrieval by using JavaScript functions to do math or change text.
  7. Inspect data with utility functions like Object.keys() and JSON.stringify().
  8. Summarize data from multiple items using .all() and arrow functions.

Set up steps

Setup time: 0 minutes!

This workflow is a self-contained tutorial and requires no setup or external credentials.

  1. Click "Execute Workflow" to run the entire tutorial.
  2. Follow the flow from the "Source Data" node to the "Final Exam" node.
  3. For each lesson, click on the node to see how its expressions are configured in the parameters panel.
  4. Read the detailed sticky note next to each lesson—it breaks down exactly how the expression works and why.

By the end, you'll have the foundational knowledge to connect data and build powerful, dynamic workflows in n8n.

n8n Expressions Tutorial Workflow

This n8n workflow provides a foundational structure for an interactive, step-by-step tutorial designed to teach beginners how to use expressions in n8n. It leverages core n8n nodes to simulate a learning environment, guiding users through concepts like data manipulation and node interaction.

What it does

This workflow is structured to facilitate learning and experimentation with n8n expressions:

  1. Manual Trigger: The workflow starts manually, allowing users to execute it at their own pace for interactive learning.
  2. Sticky Note: A "Sticky Note" node is included, likely to provide instructions, tips, or explanations to the user as they progress through the tutorial.
  3. Edit Fields (Set): An "Edit Fields (Set)" node is present, which is crucial for demonstrating how to create, modify, or transform data using expressions. This node is typically used to introduce new data fields or apply transformations to existing ones.
  4. Split Out: A "Split Out" node is included, which is used to demonstrate how to process items individually from a list or array. This is a common pattern when working with expressions to iterate over data.

Prerequisites/Requirements

  • n8n Instance: You need a running n8n instance (self-hosted or cloud) to import and execute this workflow.

Setup/Usage

  1. Import the Workflow:
    • Download the provided JSON file.
    • In your n8n instance, go to the "Workflows" section.
    • Click "New" -> "Import from JSON" and paste the workflow JSON or upload the file.
  2. Explore and Learn:
    • The workflow is designed for interactive learning. Follow any instructions provided in the "Sticky Note" node.
    • Experiment with the "Edit Fields (Set)" node to practice writing expressions. You can modify the data it outputs and observe the changes.
    • Understand how the "Split Out" node processes multiple items.
  3. Execute:
    • Click the "Execute Workflow" button on the "Manual Trigger" node to run the workflow and see the output of each step.
    • Observe the data flow and the impact of expressions in the "Edit Fields (Set)" node.

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