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isinf(3)

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RocketLink!--> Man page versions: OpenBSD FreeBSD RedHat Others

[ANSI C X3.159-1989]

ISINF(3)                  OpenBSD Programmer's Manual                 ISINF(3)

NAME
     isinf, isinff, isnan, isnanf - test for infinity or not-a-number



SYNOPSIS
     #include <math.h>

     int
     isinf(double n);

     int
     isinff(float n);

     int
     isnan(double n);

     int
     isnanf(float n);

DESCRIPTION
     The isinf() and isinff() functions returns 1 if the number n is infinity,
     otherwise 0.

     The isnan() and isnanf() functions returns 1 if the number n is ``not-a-
     number'', otherwise 0.

SEE ALSO
     math(3)

     IEEE Standard for Binary Floating-Point Arithmetic, Std 754-1985, ANSI.

BUGS
     Neither the VAX nor the Tahoe floating point have distinguished values
     for either infinity or not-a-number.  These routines always return 0 on
     those architectures.

OpenBSD 2.6                    January 29, 1994                              1

Source: OpenBSD 2.6 man pages. Copyright: Portions are copyrighted by BERKELEY
SOFTWARE DESIGN, INC., The Regents of the University of California, Massachusetts
Institute of Technology, Free Software Foundation, FreeBSD Inc., and others.



(Corrections, notes, and links courtesy of RocketAware.com)


[Detailed Topics]
FreeBSD Sources for isinf(3) functions
OpenBSD sources for isinf(3)


[Overview Topics]

Up to: Floating point math - Floating point math (including complex numbers)


RocketLink!--> Man page versions: OpenBSD FreeBSD RedHat Others

[ANSI C X3.159-1989]




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