scalb man page on OpenMandriva

Man page or keyword search:  
man Server   8135 pages
apropos Keyword Search (all sections)
Output format
OpenMandriva logo
[printable version]

SCALB(3)		   Linux Programmer's Manual		      SCALB(3)

NAME
       scalb,  scalbf,	scalbl	-  multiply  floating-point number by integral
       power of radix (OBSOLETE)

SYNOPSIS
       #include <math.h>

       double scalb(double x, double exp);
       float scalbf(float x, float exp);
       long double scalbl(long double x, long double exp);

       Link with -lm.

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       scalb():
	   _BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 500 ||
	   _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED
       scalbf(), scalbl():
	   _BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 600

DESCRIPTION
       These  functions multiply their first argument x by FLT_RADIX (probably
       2) to the power of exp, that is:

	   x * FLT_RADIX ** exp

       The definition of FLT_RADIX can be obtained by including <float.h>.

RETURN VALUE
       On success, these functions return x * FLT_RADIX ** exp.

       If x or exp is a NaN, a NaN is returned.

       If x is positive infinity (negative infinity), and exp is not  negative
       infinity, positive infinity (negative infinity) is returned.

       If x is +0 (-0), and exp is not positive infinity, +0 (-0) is returned.

       If  x is zero, and exp is positive infinity, a domain error occurs, and
       a NaN is returned.

       If x is an infinity, and exp  is	 negative  infinity,  a	 domain	 error
       occurs, and a NaN is returned.

       If the result overflows, a range error occurs, and the functions return
       HUGE_VAL, HUGE_VALF, or HUGE_VALL, respectively, with a sign  the  same
       as x.

       If  the	result	underflows,  a	range  error occurs, and the functions
       return zero, with a sign the same as x.

ERRORS
       See math_error(7) for information on how to determine whether an	 error
       has occurred when calling these functions.

       The following errors can occur:

       Domain  error:  x  is 0, and exp is positive infinity, or x is positive
       infinity and exp is negative infinity and the other argument is	not  a
       NaN
	      An invalid floating-point exception (FE_INVALID) is raised.

       Range error, overflow
	      An overflow floating-point exception (FE_OVERFLOW) is raised.

       Range error, underflow
	      An underflow floating-point exception (FE_UNDERFLOW) is raised.

       These functions do not set errno.

CONFORMING TO
       scalb()	 is   specified	  in  POSIX.1-2001,  but  marked  obsolescent.
       POSIX.1-2008 removes the specification of scalb(), recommending the use
       of  scalbln(3), scalblnf(3), or scalblnl(3) instead.  The scalb() func‐
       tion is from 4.3BSD.

       scalbf() and scalbl()  are  unstandardized;  scalbf()  is  nevertheless
       present on several other systems

SEE ALSO
       ldexp(3), scalbln(3)

COLOPHON
       This  page  is  part of release 3.58 of the Linux man-pages project.  A
       description of the project, and information about reporting  bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

				  2013-03-23			      SCALB(3)
[top]

List of man pages available for OpenMandriva

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net