LAPACK  3.10.0
LAPACK: Linear Algebra PACKage

◆ 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.

Definition at line 58 of file disnan.f.

59 *
60 * -- LAPACK auxiliary routine --
61 * -- LAPACK is a software package provided by Univ. of Tennessee, --
62 * -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
63 *
64 * .. Scalar Arguments ..
65  DOUBLE PRECISION, INTENT(IN) :: DIN
66 * ..
67 *
68 * =====================================================================
69 *
70 * .. External Functions ..
71  LOGICAL DLAISNAN
72  EXTERNAL dlaisnan
73 * ..
74 * .. Executable Statements ..
75  disnan = dlaisnan(din,din)
76  RETURN
logical function disnan(DIN)
DISNAN tests input for NaN.
Definition: disnan.f:59
logical function dlaisnan(DIN1, DIN2)
DLAISNAN tests input for NaN by comparing two arguments for inequality.
Definition: dlaisnan.f:74
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