NAME

       disnan.f -

SYNOPSIS

   Functions/Subroutines
       logical function disnan (DIN)
           DISNAN tests input for NaN.

Function/Subroutine Documentation

   logical function disnan (double precisionDIN)
       DISNAN tests input for NaN.

       Purpose:

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

       Parameters:
           DIN

                     DIN is DOUBLE PRECISION
                     Input to test for NaN.

       Author:
           Univ. of Tennessee

           Univ. of California Berkeley

           Univ. of Colorado Denver

           NAG Ltd.

       Date:
           September 2012

       Definition at line 60 of file disnan.f.

Author

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