Интерактивная система просмотра системных руководств (man-ов) exp2l (3) exp2l ( Русские man: Библиотечные вызовы ) >> exp2l ( Linux man: Библиотечные вызовы ) exp2l ( POSIX man: Библиотечные вызовы )
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
exp2 (),
exp2f (),
exp2l ():
_XOPEN_SOURCE >= 600 || _ISOC99_SOURCE; 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
ERRORS
See
math_error
For a discussion of the errors that can occur for these functions, see
exp
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 cexp2 exp exp10 sqrt
COLOPHON
This page is part of release 3.14 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
