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EXP2(3)			   Linux Programmer's Manual		       EXP2(3)

NAME
       exp2, exp2f, exp2l - base-2 exponential function

SYNOPSIS
       #include	<math.h>

       double exp2(double x);
       float exp2f(float x);
       long double exp2l(long double x);

       Link with -lm.

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

       exp2(), exp2f(),	exp2l():
	   _XOPEN_SOURCE >= 600	|| _ISOC99_SOURCE ||
	   _POSIX_C_SOURCE >= 200112L;
	   or cc -std=c99

DESCRIPTION
       The exp2() function returns the value of	2 raised to the	power of x.

RETURN VALUE
       On success, these functions return the base-2 exponential value of x.

       For various special cases, including the	handling of infinity and  NaN,
       as well as overflows and	underflows, see	exp(3).

ERRORS
       See  math_error(7) for information on how to determine whether an error
       has occurred when calling these functions.

       For a discussion	of the errors that can occur for these functions,  see
       exp(3).

VERSIONS
       These functions first appeared in glibc in version 2.1.

CONFORMING TO
       C99, POSIX.1-2001.  The variant returning double	also conforms to SVr4,
       4.3BSD, C89.

SEE ALSO
       cbrt(3),	cexp2(3), exp(3), exp10(3), sqrt(3)

COLOPHON
       This page is part of release 3.74 of the	Linux  man-pages  project.   A
       description  of	the project, information about reporting bugs, and the
       latest	 version    of	  this	  page,	   can	   be	  found	    at
       http://www.kernel.org/doc/man-pages/.

				  2010-09-20			       EXP2(3)

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | VERSIONS | CONFORMING TO | SEE ALSO | COLOPHON

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<https://www.freebsd.org/cgi/man.cgi?query=exp2&sektion=3&manpath=Debian+8.1.0>

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