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  4. disnan.f(3)

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disnan.f(3) LAPACK disnan.f(3)

NAME

disnan.f

SYNOPSIS

Functions/Subroutines


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

Function/Subroutine Documentation

logical function disnan (double precision, intent(in) DIN)

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:

June 2017

Definition at line 61 of file disnan.f.

Author

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Tue Nov 14 2017 Version 3.8.0