# Extract last 2 characters of a given string

**URL:** <https://discuss.elastic.co/t/extract-last-2-characters-of-a-given-string/134587>\
**Category:** Logstash\
**Created:** [June 5, 2018, 10:16am UTC](https://discuss.elastic.co/t/extract-last-2-characters-of-a-given-string/134587 "2018-06-05T10:16:20Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![kkrg](https://avatars.discourse-cdn.com/v4/letter/k/b9e5f3/32.png) [@kkrg](https://discuss.elastic.co/u/kkrg)\
**Post date:** [June 5, 2018, 10:16am UTC](https://discuss.elastic.co/t/extract-last-2-characters-of-a-given-string/134587/1 "2018-06-05T10:16:21Z")

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Hello,

I have a requirement to extract last 2 characters from a given string. Please let me know which logstash function I can use to achieve this.

Thanks,  
Kiran

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<div class="post-metadata">

**Author:** ![Badger](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/badger/32/25190_2.png) [@Badger](https://discuss.elastic.co/u/Badger)\
**Post date:** [June 5, 2018, 10:22am UTC](https://discuss.elastic.co/t/extract-last-2-characters-of-a-given-string/134587/2 "2018-06-05T10:22:48Z")

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You can do that using grok.

```
grok { match => ["somefield", "(?<lastTwo>..)$"] }
```

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<div class="post-metadata">

**Author:** ![kkrg](https://avatars.discourse-cdn.com/v4/letter/k/b9e5f3/32.png) [@kkrg](https://discuss.elastic.co/u/kkrg)\
**Post date:** [June 5, 2018, 11:22am UTC](https://discuss.elastic.co/t/extract-last-2-characters-of-a-given-string/134587/3 "2018-06-05T11:22:30Z")

</div>

Hi Badger,

Thanks for the reply, can you please give an example to understand more.

Thanks

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<div class="post-metadata">

**Author:** ![Badger](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/badger/32/25190_2.png) [@Badger](https://discuss.elastic.co/u/Badger)\
**Post date:** [June 5, 2018, 11:40am UTC](https://discuss.elastic.co/t/extract-last-2-characters-of-a-given-string/134587/4 "2018-06-05T11:40:54Z")

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I am using a grok [custom pattern](https://www.elastic.co/guide/en/logstash/current/plugins-filters-grok.html#_custom_patterns). It matches two characters (..) anchored at the end of a line / string (using $).

Note that if you pass a multi-line field to this grok it will match the end of the first line. If you want to match the end of a multi-line field then change $ to \z.

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 3, 2018, 11:41am UTC](https://discuss.elastic.co/t/extract-last-2-characters-of-a-given-string/134587/5 "2018-07-03T11:41:04Z")

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