sisnan(l) - Linux man page

Name

SISNAN - returns .TRUE

Synopsis

LOGICAL FUNCTION

SISNAN(SIN)

REAL

SIN

Purpose

SISNAN 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.