How to get Elasticsearch Index Prefix value Magento 2?

Elasticsearch Index Prefix parameter used to the indexing of search term prefixes to speed up prefix searches on a website.

You can set Elasticsearch Index Prefix from the admin panel

Out of the box, the default value is the magento2.

If you are using a single elastic search instance for more than one Magento installation, you need to specify a unique prefix for each installation to prevent mess up indexing terms with the different installation. Like, production, staging, development.

Get the value of index prefix by the given syntax,