.. highlightlang:: us

.. _isreal:

isreal
======

.. index:: isreal

.. us.tag  isreal ENGLISH

:ref:`isreal` checks if its argument is a
real scalar or real matrix.

.. function::  bool = isreal(m)

.. us.return

**Return Value**

*bool* is TRUE (1), if the argument is a real scalar or real
matrix and FALSE (0), if the argument is of another type.

.. us.params

**Parameters**

.. uparam:: m

   *m* is a scalar, matrix or function.

.. us.example

**Example**

::

   a = 1.23
   isreal(a)
        1.0000
   isreal(sin)
        0.0000
   isreal(1 + 3i)
        0.0000

.. seealso::
   :ref:`overview-mathematic`,
   :ref:`type`,
   :ref:`iscomplex`,
   :ref:`isstring`

:sub:`id-539495`