SRC/disnan.f(3) Library Functions Manual SRC/disnan.f(3)

SRC/disnan.f


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

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.

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