1EXP2(3)                    Linux Programmer's Manual                   EXP2(3)
2
3
4

NAME

6       exp2, exp2f, exp2l - base-2 exponential function
7

SYNOPSIS

9       #include <math.h>
10
11       double exp2(double x);
12       float exp2f(float x);
13       long double exp2l(long double x);
14
15       Link with -lm.
16
17   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
18
19       exp2(), exp2f(), exp2l():
20           _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE ||
21           _POSIX_C_SOURCE >= 200112L;
22           or cc -std=c99
23

DESCRIPTION

25       The exp2() function returns the value of 2 raised to the power of x.
26

RETURN VALUE

28       On success, these functions return the base-2 exponential value of x.
29
30       For various special cases, including the handling of infinity and  NaN,
31       as well as overflows and underflows, see exp(3).
32

ERRORS

34       See  math_error(7) for information on how to determine whether an error
35       has occurred when calling these functions.
36
37       For a discussion of the errors that can occur for these functions,  see
38       exp(3).
39

VERSIONS

41       These functions first appeared in glibc in version 2.1.
42

CONFORMING TO

44       C99, POSIX.1-2001.  The variant returning double also conforms to SVr4,
45       4.3BSD, C89.
46

SEE ALSO

48       cbrt(3), cexp2(3), exp(3), exp10(3), sqrt(3)
49

COLOPHON

51       This page is part of release 3.53 of the Linux  man-pages  project.   A
52       description  of  the project, and information about reporting bugs, can
53       be found at http://www.kernel.org/doc/man-pages/.
54
55
56
57                                  2010-09-20                           EXP2(3)
Impressum