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

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

SYNOPSIS
       #include <math.h>

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

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

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

       Link with -lm.

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

       scalb(), scalbf(), scalbl(): _BSD_SOURCE || _SVID_SOURCE ||
       _XOPEN_SOURCE >= 500
       scalbn(), scalbnf(), scalbnl(): _BSD_SOURCE || _SVID_SOURCE ||
       _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE; or cc -std=c99
       scalbln(), scalblnf(), scalblnl(): _XOPEN_SOURCE >= 600 ||
       _ISOC99_SOURCE; or cc -std=c99

DESCRIPTION
       These  functions multiply their first argument x by FLT_RADIX (probably
       2) to the power exp.

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

       The value of FLT_RADIX is found in <float.h>.

CONFORMING TO
       The scalb() function is from 4.3BSD.  The scalbn() and scalbln()  func-
       tions  are from C99.  All three are in POSIX.1-2001.  The scalb() func-
       tion is marked obsolescent.

SEE ALSO
       ldexp(3)

COLOPHON
       This page is part of release 3.05 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/.

                                  2007-07-26                          SCALB(3)

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