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--- |
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title: Code in n8n Documentation and Guides |
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description: Access documentation and guides on using code and expressions in n8n and other developer resources. |
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contentType: overview |
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--- |
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# Code in n8n |
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n8n is a low-code tool. This means you can do a lot without code, then add code when needed. |
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## Code in your workflows |
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There are two places in your workflows where you can use code: |
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<div class="grid-cards-vertical cards" markdown> |
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- __Expressions__ |
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Use [expressions](/glossary.md#expression-n8n) to transform [data](/data/index.md) in your nodes. You can use JavaScript in expressions, as well as n8n's [Built-in methods and variables](/code/builtin/overview.md) and [Data transformation functions](/code/builtin/data-transformation-functions/index.md). |
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[:octicons-arrow-right-24: Expressions](/code/expressions.md) |
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- __Code node__ |
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Use the Code node to add JavaScript or Python to your workflow. |
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[:octicons-arrow-right-24: Code node](/code/code-node.md) |
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</div> |
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## Other technical resources |
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These are features that are relevant to technical users. |
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### Technical nodes |
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n8n provides core nodes, which simplify adding key functionality such as API requests, webhooks, scheduling, and file handling. |
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<div class="grid-cards-vertical cards" markdown> |
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- __Write a backend__ |
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The [HTTP Request](/integrations/builtin/core-nodes/n8n-nodes-base.httprequest/index.md), [Webhook](/integrations/builtin/core-nodes/n8n-nodes-base.webhook/index.md), and [Code](/code/code-node.md) nodes help you make API calls, respond to webhooks, and write any JavaScript in your workflow. |
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Use this do things like [Create an API endpoint](https://n8n.io/workflows/1750-creating-an-api-endpoint/){:target=_blank .external-link}. |
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[:octicons-arrow-right-24: Core nodes](/integrations/builtin/core-nodes/index.md) |
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- __Represent complex logic__ |
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You can build complex flows, using nodes like [If](/integrations/builtin/core-nodes/n8n-nodes-base.if.md), [Switch](/integrations/builtin/core-nodes/n8n-nodes-base.switch.md), and [Merge](/integrations/builtin/core-nodes/n8n-nodes-base.merge.md) nodes. |
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[:octicons-arrow-right-24: Flow logic](/flow-logic/index.md) |
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</div> |
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### Other developer resources |
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<div class="grid-cards-vertical cards" markdown> |
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- __The n8n API__ |
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n8n provides an API, where you can programmatically perform many of the same tasks as you can in the GUI. There's an [n8n API node](/integrations/builtin/core-nodes/n8n-nodes-base.n8n.md) to access the API in your workflows. |
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[:octicons-arrow-right-24: API](/api/index.md) |
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- __Self-host__ |
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You can self-host n8n. This keeps your data on your own infrastructure. |
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[:octicons-arrow-right-24: Hosting](/hosting/index.md) |
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- __Build your own nodes__ |
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You can build custom nodes, install them on your n8n instance, and publish them to [npm](https://www.npmjs.com/){:target=_blank .external-link}. |
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[:octicons-arrow-right-24: Creating nodes](/integrations/creating-nodes/overview.md) |
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</div> |
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