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.\"     @(#)ldexp.3	8.2 (Berkeley) 4/19/94
.\" $FreeBSD: head/lib/libc/gen/ldexp.3 165903 2007-01-09 00:28:16Z imp $
.\"
.Dd March 4, 2005
.Dt LDEXP 3
.Os
.Sh NAME
.Nm ldexp ,
.Nm ldexpf ,
.Nm ldexpl
.Nd multiply floating-point number by integral power of 2
.Sh LIBRARY
.Lb libm
.Sh SYNOPSIS
.In math.h
.Ft double
.Fn ldexp "double x" "int exp"
.Ft float
.Fn ldexpf "float x" "int exp"
.Ft long double
.Fn ldexpl "long double x" "int exp"
.Sh DESCRIPTION
The
.Fn ldexp ,
.Fn ldexpf ,
and
.Fn ldexpl
functions multiply a floating-point number by an integral
power of 2.
.Sh RETURN VALUES
These functions return the value of
.Fa x
times 2 raised to the power
.Fa exp .
.Sh SEE ALSO
.Xr frexp 3 ,
.Xr math 3 ,
.Xr modf 3
.Sh STANDARDS
The
.Fn ldexp ,
.Fn ldexpf ,
and
.Fn ldexpl
functions conform to
.St -isoC-99 .