..
  Copyright 1988-2021 Free Software Foundation, Inc.
  This is part of the GCC manual.
  For copying conditions, see the GPL license file

.. _ibset:

IBSET --- Set bit
*****************

.. index:: IBSET

.. index:: BBSET

.. index:: IIBSET

.. index:: JIBSET

.. index:: KIBSET

.. index:: bits, set

.. function:: IBSET

  ``IBSET`` returns the value of :samp:`{I}` with the bit at position
  :samp:`{POS}` set to one.

  :param I:
    The type shall be ``INTEGER``.

  :param POS:
    The type shall be ``INTEGER``.

  :return:
    The return value is of type ``INTEGER`` and of the same kind as
    :samp:`{I}`.

  :samp:`{Standard}:`
    Fortran 90 and later, has overloads that are GNU extensions

  :samp:`{Class}:`
    Elemental function

  :samp:`{Syntax}:`

  .. code-block:: fortran

    RESULT = IBSET(I, POS)

  :samp:`{Specific names}:`
    =============  ================  ==============  ====================
    Name           Argument          Return type     Standard
    =============  ================  ==============  ====================
    ``IBSET(A)``   ``INTEGER A``     ``INTEGER``     Fortran 90 and later
    ``BBSET(A)``   ``INTEGER(1) A``  ``INTEGER(1)``  GNU extension
    ``IIBSET(A)``  ``INTEGER(2) A``  ``INTEGER(2)``  GNU extension
    ``JIBSET(A)``  ``INTEGER(4) A``  ``INTEGER(4)``  GNU extension
    ``KIBSET(A)``  ``INTEGER(8) A``  ``INTEGER(8)``  GNU extension
    =============  ================  ==============  ====================

  :samp:`{See also}:`
    IBCLR, 
    IBITS, 
    IAND, 
    IOR, 
    IEOR, 
    MVBITS