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---
title: strings.Diff
description: Returns an anchored diff of the two texts OLD and NEW in the unified diff format. If OLD and NEW are identical, returns an empty string.
categories: []
keywords: []
params:
functions_and_methods:
returnType: string
signatures: [strings.Diff OLDNAME OLD NEWNAME NEW]
---
{{< new-in 0.125.0 />}}
Use `strings.Diff` to compare two strings and render a highlighted diff:
```go-html-template
{{ $want := `
<p>The product of 6 and 7 is 42.</p>
<p>The product of 7 and 6 is 42.</p>
`}}
{{ $got := `
<p>The product of 6 and 7 is 42.</p>
<p>The product of 7 and 6 is 13.</p>
`}}
{{ $diff := strings.Diff "want" $want "got" $got }}
{{ transform.Highlight $diff "diff" }}
```
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