.\" Copyright 2004 Andries Brouwer <aeb@cwi.nl>.
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.TH SCALB 3 2004-10-31 "" "Linux Programmer's Manual"
.SH NAME
scalb, scalbf, scalbl, scalbn, scalbnf, scalbnl, scalbln, scalblnf, scalblnl \-
multiply floating-point number by integral power of radix
.SH SYNOPSIS
.B #include <math.h>
.sp
.BI "double scalb(double " x ", double " exp );
.br
.BI "float scalbf(float " x ", double " exp );
.br
.BI "long double scalbl(long double " x ", double " exp );
.sp
.BI "double scalbn(double " x ", int " exp );
.br
.BI "float scalbnf(float " x ", int " exp );
.br
.BI "long double scalbnl(long double " x ", int " exp );
.sp
.BI "double scalbln(double " x ", long int " exp );
.br
.BI "float scalblnf(float " x ", long int " exp );
.br
.BI "long double scalblnl(long double " x ", long int " exp );
.sp
Link with \fI-lm\fP.
.SH DESCRIPTION
These functions multiply their first argument
.I x
by FLT_RADIX (probably 2) to the power
.IR exp .

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

The value of FLT_RADIX is found in
.IR <float.h> .
.\" not in /usr/include but in a gcc lib
.SH "CONFORMING TO"
The
.BR scalb ()
function is from 4.3BSD.
The
.BR scalbn ()
and
.BR scalbln ()
functions are from C99.
All three are in POSIX.1-2001.
The
.BR scalb ()
function is marked obsolescent.
.SH "SEE ALSO"
.BR ldexp (3)