# scalbnf(3)

#### NAME

scalbn,  scalbnf,  scalbnl,  scalbln,  scalblnf,  scalblnl  -  multiply
floating-point number by integral power of radix

#### SYNOPSIS

#include <math.h>

double scalbln(double x, long int exp);
float scalblnf(float x, long int exp);
long double scalblnl(long double x, long int exp);

double scalbn(double x, int exp);
float scalbnf(float x, int exp);
long double scalbnl(long double x, int exp);

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

scalbln(), scalblnf(), scalblnl():
_ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
|| /* Since glibc 2.19: */ _DEFAULT_SOURCE
scalbn(), scalbnf(), scalbnl():
_ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
|| /* Since glibc 2.19: */ _DEFAULT_SOURCE
|| /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE

#### DESCRIPTION

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

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

#### RETURNVALUE

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

If x is a NaN, a NaN is returned.

If  x  is  positive  infinity  (negative  infinity),  positive infinity
(negative infinity) is returned.

If x is +0 (-0), +0 (-0) 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:

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.

#### VERSIONS

These functions first appeared in glibc in version 2.1.

#### ATTRIBUTES

For  an  explanation  of  the  terms  used   in   this   section,   see
attributes(7).

┌──────────────────────────────────┬───────────────┬─────────┐
│InterfaceAttributeValue   │
├──────────────────────────────────┼───────────────┼─────────┤
│scalbn(), scalbnf(), scalbnl(),   │ Thread safety │ MT-Safe │
│scalbln(), scalblnf(), scalblnl() │               │         │
└──────────────────────────────────┴───────────────┴─────────┘

#### CONFORMINGTO

C99, POSIX.1-2001, POSIX.1-2008.

#### NOTES

These  functions  differ  from  the  obsolete  functions  described  in
scalb(3) in the type of their second argument.  The functions described
on this page have a second argument of an integral type, while those in
scalb(3) have a second argument of type double.

If FLT_RADIX equals 2 (which is usual), then scalbn() is equivalent  to
ldexp(3).

#### SEEALSO

ldexp(3), scalb(3)

#### COLOPHON

This  page  is  part of release 4.09 of the Linux man-pages project.  A
description of the project, information about reporting bugs,  and  the
latest     version     of     this    page,    can    be    found    at
https://www.kernel.org/doc/man-pages/.

2016-03-15                        SCALBLN(3)

## More Linux Commands

manpages/mdvalidater.1.html
mdvalidater(1) - Validate XML Documents against the ECMA Doc
mdvalidator has been obsoleted by mdoc(1). See the mdoc-validate(1) man page. mdvalidator is a program that validates the specified FILES against the ECMA Docum

manpages/XkbAllocKeyboard.3.html
XkbAllocKeyboard(3) - Creates a keyboard description from sc
Applications seldom need to directly allocate a keyboard description; calling XkbGetKeyboard usually suffices. In the event you need to create a keyboard descri

manpages/sinl.3.html
sinl(3) - sine function (Library - Linux man page)..........
The sin() function returns the sine of x, where x is given in radians. RETURN VALUE On success, these functions return the sine of x. If x is a NaN, a NaN is re

manpages/oodraw.1.html
oodraw(1) - LibreOffice office suite - Linux manual page....
LibreOffice (LO for short) is a multi-platform office productivity suite. It was derived from OpenOffice.org 3.3 Beta on September 28, 2010. libreoffice is a sh

manpages/dnsblog.8.html
dnsblog(8) - Postfix DNS white/blacklist logger (Man Page)
The dnsblog(8) server implements an ad-hoc DNS white/blacklist lookup service. This may eventually be replaced by an UDP client that is built directly into the

manpages/XFillRectangle.3.html
XFillRectangle(3) - fill rectangles, polygons, or arcs......
The XFillRectangle and XFillRectangles functions fill the specified rectangle or rectangles as if a four-point FillPolygon protocol request were specified for e

manpages/Tcl_AppendStringsToObj.3.html
Tcl_AppendStringsToObj(3) - manipulate Tcl objects as string
The procedures described in this manual entry allow Tcl objects to be manipulated as string values. They use the internal representation of the object to store

cacademo(1) - libcaca's demonstration applications (ManPage)
This manual page documents briefly the cacademo and cacafire programs. cacademo displays ASCII art effects with animated transitions: metaballs, moire pattern o

manpages/perl5121delta.1.html
perl5121delta(1) - what is new for perl v5.12.1 (Man Page)
This document describes differences between the 5.12.0 release and the 5.12.1 release. If you are upgrading from an earlier release such as 5.10.1, first read p

manpages/glutStrokeCharacter.3.html
glutStrokeCharacter(3) - renders a stroke character using Op
Without using any display lists, glutStrokeCharacter renders the character in the named stroke font. The available fonts are: GLUT_STROKE_ROMAN A proportionally

manpages/Tcl_EventuallyFree.3.html
Tcl_EventuallyFree(3) - avoid freeing storage while it is be
These three procedures help implement a simple reference count mechanism for managing storage. They are designed to solve a problem having to do with widget del

manpages/ModemManager.8.html
ModemManager(8) modem management daemon - Linux manual page
The ModemManager daemon provides a unified high level API for communicating with (mobile broadband) modems. While the basic commands are standardized, the more