.. _-parameter-:

parameter
=========

Signature
---------

.. includecode2:: /../../akka-http/src/main/scala/akka/http/scaladsl/server/directives/ParameterDirectives.scala
   :snippet: parameter

Description
-----------
Extracts a *query* parameter value from the request.

See :ref:`-parameters-` for a detailed description of this directive.

See :ref:`which-parameter-directive` to understand when to use which directive.

Example
-------

.. includecode2:: ../../../../code/docs/http/scaladsl/server/directives/ParameterDirectivesExamplesSpec.scala
   :snippet: example-1