◆ sisnan()

logical function sisnan ( real, intent(in) sin )

SISNAN tests input for NaN.

Download SISNAN + dependencies [TGZ] [ZIP] [TXT]

Purpose:

!>
!> SISNAN returns .TRUE. if its argument is NaN, and .FALSE.
!> otherwise.  To be replaced by the Fortran 2003 intrinsic in the
!> future.
!>

Parameters

[in]

SIN

!>          SIN is REAL
!>          Input to test for NaN.
!>

Author: Univ. of Tennessee; Univ. of California Berkeley; Univ. of Colorado Denver; NAG Ltd.