---
title: strings.FindRE
linkTitle: findRE
description: Returns a slice of strings that match the regular expression.
categories: [functions]
keywords: []
menu:
  docs:
    parent: functions
function:
  aliases: [findRE]
  returnType: string
  signatures: ['strings.FindRE PATTERN INPUT [LIMIT]']
relatedFunctions:
  - strings.FindRE
  - strings.FindRESubmatch
  - strings.Replace
  - strings.ReplaceRE
aliases: [/functions/findre]
---
By default, `findRE` finds all matches. You can limit the number of matches with an optional LIMIT argument.

{{% readfile file="/functions/_common/regular-expressions.md" %}}

This example returns a slice of all second level headings (`h2` elements) within the rendered `.Content`:

```go-html-template
{{ findRE `(?s)<h2.*?>.*?</h2>` .Content }}
```

The `s` flag causes `.` to match `\n` as well, allowing us to find an `h2` element that contains newlines.

To limit the number of matches to one:

```go-html-template
{{ findRE `(?s)<h2.*?>.*?</h2>` .Content 1 }}
```

{{% note %}}
You can write and test your regular expression using [regex101.com](https://regex101.com/). Be sure to select the Go flavor before you begin.
{{% /note %}}