SISNAN(1) LAPACK auxiliary routine (version 3.2) SISNAN(1)NAMESISNAN - returns .TRUE
SYNOPSIS
LOGICAL FUNCTION SISNAN(SIN)
REAL SIN
PURPOSESISNAN returns .TRUE. if its argument is NaN, and .FALSE. otherwise.
To be replaced by the Fortran 2003 intrinsic in the future.
ARGUMENTS
SIN (input) REAL
Input to test for NaN.
LAPACK auxiliary routine (versioNovember 2008 SISNAN(1)