Name

ldexp, ldexpf, ldexpl — multiply floating-point number by integral power of 2

Synopsis

#include <math.h>
double ldexp( double   x,
  int   exp);
float ldexpf( float   x,
  int   exp);
long double ldexpl( long double   x,
  int   exp);
[Note] Note

Link with −lm.

DESCRIPTION

The ldexp() function returns the result of multiplying the floating-point number x by 2 raised to the power exp.

CONFORMING TO

SVr4, 4.3BSD, C89. The float and long double variants are C99 requirements.

SEE ALSO

frexp(3), modf(3), scalb(3)

COLOPHON

This page is part of release 2.79 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/.


  Copyright 1993 David Metcalfe (davidprism.demon.co.uk)

Permission is granted to make and distribute verbatim copies of this
manual provided the copyright notice and this permission notice are
preserved on all copies.

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manual under the conditions for verbatim copying, provided that the
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permission notice identical to this one.

Since the Linux kernel and libraries are constantly changing, this
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Formatted or processed versions of this manual, if unaccompanied by
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References consulted:
    Linux libc source code
    Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
    386BSD man pages
Modified 1993-07-24 by Rik Faith (faithcs.unc.edu)
Modified 2004-10-31 by aeb