isnan(3STDC)

NAME | SYNOPSIS | API RESTRICTIONS | DESCRIPTION | ATTRIBUTES

NAME

isinf, isnan- test for infinity or not-a-number

SYNOPSIS

$(NUCLEUS_DIR)/lib/classix/libsys.s.a
#include <math.h>

int isinf(double number);
int isnan(double number);

API RESTRICTIONS

The function or functions documented here may not be used safely in all application contexts with all APIs provided in the ChorusOS 5.0 product.

See API(5FEA) for details.

DESCRIPTION

The isinf() function returns 1 if number is ``infinite'', otherwise 0.

The isnan() function returns 1 if number is ``not-a-number'', otherwise 0.

ATTRIBUTES

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE	ATTRIBUTE VALUE
Interface Stability	Evolving

NAME | SYNOPSIS | API RESTRICTIONS | DESCRIPTION | ATTRIBUTES