isnan(3C) — sys5 — Apollo Domain/OS SR10.4

ISNAN(3C)                            SysV                            ISNAN(3C)



NAME
     isnan - test for NaN (Not a Number)

SYNOPSIS
     #include <math.h>

     int isnan (x)
     double x;

DESCRIPTION
     The isnan function tests whether x is NaN (Not a Number).  x specifies a
     double value.


DIAGNOSTICS
     The isnan function returns a nonzero value if x is NaN.  Otherwise, 0
     (zero) is returned.

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