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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