.. _count:

=====
count
===== 

The number of items in a sequence

Description
~~~~~~~~~~~
The fn:count function returns the number of items in a sequence, as an 
xs:integer.

.. list-table::
   :widths: 40 60
   :header-rows: 1

   * - **Parameters**
     - **Description**
   * - arg:integer()
     - the sequence of items to count

Examples
~~~~~~~~
.. list-table::
   :widths: 50 50
   :header-rows: 1

   * - **XPath**
     - **Results**
   * - count( (1, 2, 3) )
     - 3
   * - count($ordDoc//item)
     - 6
   * - count(distinct-values($ordDoc//item/@num))
     - 4
   * - count( (1, 2, 3, () ) )
     - 3
   * - count( () )
     - 0

See Also
~~~~~~~~

.. toctree::
   :titlesonly:
   :glob:

* :ref:`sum`.