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32.\" from: @(#)ieee.3 6.4 (Berkeley) 5/6/91
33.\" $Id: scalbn.3,v 1.4 2004/12/20 21:35:46 scp Exp $
34.\"
35.Dd July 02, 2008
36.Dt SCALBN 3
37.Os
38.Sh NAME
39.Nm scalbn, scalbln
40.Sh SYNOPSIS
41.Fd #include <math.h>
42.Ft double
43.Fn scalbn "double x" "int n"
44.Ft long double
45.Fn scalbnl "long double x" "int n"
46.Ft float
47.Fn scalbnf "float x" "int n"
48.Ft double
49.Fn scalbln "double x" "long int n"
50.Ft long double
51.Fn scalblnl "long double x" "long int n"
52.Ft float
53.Fn scalblnf "float x" "long int n"
54.Sh DESCRIPTION
55The
56.Fn scalbn
57, and
58.Fn scalbln
59functions return
60.Fa x Ns \(**(2** Ns Fa n )
61computed by exponent manipulation.
62.Sh SPECIAL VALUES
63.Fn scalbn "�0" "n"
64returns �0.
65.Pp
66.Fn scalbn "x" "0"
67returns x.
68.Pp
69.Fn scalbn "�infinity" "n"
70returns �infinity.
71.Pp
72.Fn scalbln
73has the same special values.
74.Sh NOTE
75The
76.Fn scalb
77function is deprecated.
78.Fn scalbn
79should be used instead.
80.Sh SEE ALSO
81.Xr math 3 ,
82.Xr ldexp 3
83.Sh STANDARDS
84The
85.Fn scalbn
86and
87.Fn scalbln
88functions conform to ISO/IEC 9899:1999(E).