.. highlightlang:: us

.. _isinf:

isinf
=====

.. index:: isinf

.. us.tag  isinf NOTREADYENGLISH Changed593 oldfunc

:ref:`isinf` checks if its argument is in the range -INF ... INF.

.. function::  r = isinf(m)

.. us.return

**Return Value**

*r* is TRUE (0) if the number in infinit: I.e. ``-INF < m < INF`` or
*m* is NaN and FALSE (0) if *m* is finit.

.. us.params

**Parameters**

.. uparam:: m

   is a real scalar or real matrix.

.. us.history

**History**

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

   * - Version
     - Description
   * - 5.9.3
     - This function is obsolete, use :ref:`isfinite` instead.

.. seealso::
   :ref:`overview-mathematic`,
   :ref:`isnan`,
   :ref:`isfinite`

:sub:`id-149539`