Man page or keyword search:   man All Sections 1 - General Commands 2 - System Calls 3 - Subroutines, Functions 4 - Special Files 5 - File Formats 6 - Games and Screensavers 7 - Macros and Conventions 8 - Maintenence Commands 9 - Kernel Interface New Commands Server 4.4BSD AIX Alpinelinux Archlinux Aros BSDOS BSDi Bifrost CentOS Cygwin Darwin Debian DigitalUNIX DragonFly ElementaryOS Fedora FreeBSD Gentoo GhostBSD HP-UX Haiku Hurd IRIX Inferno JazzOS Kali Knoppix LinuxMint MacOSX Mageia Mandriva Manjaro Minix MirBSD NeXTSTEP NetBSD OPENSTEP OSF1 OpenBSD OpenDarwin OpenIndiana OpenMandriva OpenServer OpenSuSE OpenVMS Oracle PC-BSD Peanut Pidora Plan9 QNX Raspbian RedHat Scientific Slackware SmartOS Solaris SuSE SunOS Syllable Tru64 UNIXv7 Ubuntu Ultrix UnixWare Xenix YellowDog aLinux   9087 pages apropos Keyword Search (all sections) Output format html ascii pdf view pdf save postscript

ISNORMAL(3)		 BSD Library Functions Manual		   ISNORMAL(3)

NAME
     isnormal — test for normal value

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <math.h>

     int
     isnormal(real-floating x);

DESCRIPTION
     The isnormal() macro determines whether its argument x has a normal
     value.  An argument represented in a format wider than its semantic type
     is converted to its semantic type first.  The determination is then based
     on the type of the argument.

   IEEE 754
     It is determined whether the value of x is normal, and neither zero, sub‐
     normal, infinite nor NaN.

   VAX
     It is determined whether the value of x is finite, and neither true zero,
     dirty zero nor ROP.

RETURN VALUES
     The isnormal() macro returns a non-zero value if the value of x is
     finite.  Otherwise 0 is returned.

ERRORS
     No errors are defined.

SEE ALSO
     fpclassify(3), isfinite(3), math(3), signbit(3)

STANDARDS
     The isnormal() macro conforms to ISO/IEC 9899:1999 (“ISO C99”).

BSD			       October 29, 2003				   BSD

                             _         _         _ 
                            | |       | |       | |     
                            | |       | |       | |     
                         __ | | __ __ | | __ __ | | __  
                         \ \| |/ / \ \| |/ / \ \| |/ /  
                          \ \ / /   \ \ / /   \ \ / /   
                           \   /     \   /     \   /    
                            \_/       \_/       \_/ 

Vote for polarhome