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) ; |
![[Note]](../stylesheet/note.png) |
Note |
Link with −lm .
|
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
() functions are from
C99. All three are in POSIX.1-2001. The scalb
() function is marked obsolescent.
SEE ALSO
ldexp(3)
Copyright 2004 Andries Brouwer <aeb@cwi.nl>.
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