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title: Diff (dw::util::Diff)
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---
product: DataWeave
version: 2.9
---

# Diff (dw::util::Diff)

> For the full documentation index, see: https://docs.mulesoft.com/llms.txt

This utility module calculates the difference between two values and returns a list of differences.

To use this module, you must import it to your DataWeave code, for example, by adding the line
`import * from dw::util::Diff` to the header of your DataWeave script.

## Functions

<table><colgroup><col> <col></colgroup><thead><tr><th>Name</th><th>Description</th></tr></thead><tbody><tr><td><p><a href="https://docs.mulesoft.com/dataweave/2.9/dw-diff-functions-diff">diff</a></p></td><td><p>Returns the structural differences between two values.</p></td></tr></tbody></table>

## Types

- [Diff Types](https://docs.mulesoft.com/dataweave/2.9/dw-diff-types)