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isnan(3) Library Functions Manual isnan(3)

NAME

isnan - isnan: test for NaN

SYNOPSIS

Functions


logical function DISNAN (din)
DISNAN tests input for NaN. logical function SISNAN (sin)
SISNAN tests input for NaN.

Detailed Description

Function 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.

Definition at line 58 of file disnan.f.

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

SISNAN tests input for NaN.

Purpose:

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

Parameters

SIN 

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

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line 58 of file sisnan.f.

Author

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Version 3.12.0 LAPACK