EXP2
Section: Linux Programmer's Manual (3)
Updated: 2010-09-20
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 3.27 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/.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- VERSIONS
-
- CONFORMING TO
-
- SEE ALSO
-
- COLOPHON
-
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Time: 07:35:26 GMT, March 26, 2013