.. highlightlang:: us

.. index:: nc_varinq_changed

.. _nc_varinq_changed:

nc_varinq_changed
=================

.. us.tag  nc_varinq_changed ENGLISH NC_Var New5100

:ref:`nc_varinq_changed` returns the change counter of a netCDF variable.

.. function::  change_counter = nc_varinq_changed(ncid, varid)

.. us.return

**Return Value**

If an error occurs, *change_counter* is -1.

.. us.params

**Parameters**

.. uparam:: ncid

   Identifies the netCDF file.

.. uparam:: varid

   *varid* is the ID of the variable.

.. us.comment

**Comment**

This function can only be used for netCDF-up files. See :ref:`nc_create`.
For netCDF-files (NC_FORMAT_CLASSIC and NC_FORMAT_PC) the function always 
returns -1.

.. us.history

**History**

.. list-table::
   :header-rows: 1

   * - Version
     - Description
   * - 5.10.0
     - New

.. seealso::
   :ref:`overview-netcdf-files`,
   :ref:`nc_create`

:sub:`id-1837825`