disnan()

logical function disnan

(

double precision, intent(in)

din

)

DISNAN tests input for NaN.

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

Purpose:

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

Parameters

[in]

DIN

!> DIN is DOUBLE PRECISION !> Input to test for NaN. !>

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.