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           _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
21

DESCRIPTION

23       These functions return the value of 2 raised to the power of x.
24

RETURN VALUE

26       On success, these functions return the base-2 exponential value of x.
27
28       For  various special cases, including the handling of infinity and NaN,
29       as well as overflows and underflows, see exp(3).
30

ERRORS

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

VERSIONS

39       These functions first appeared in glibc in version 2.1.
40

ATTRIBUTES

42       For an  explanation  of  the  terms  used  in  this  section,  see  at‐
43       tributes(7).
44
45       ┌────────────────────────────────────────────┬───────────────┬─────────┐
46       │Interface                                   │ Attribute     │ Value   │
47       ├────────────────────────────────────────────┼───────────────┼─────────┤
48       │exp2(), exp2f(), exp2l()                    │ Thread safety │ MT-Safe │
49       └────────────────────────────────────────────┴───────────────┴─────────┘
50

CONFORMING TO

52       C99, POSIX.1-2001, POSIX.1-2008.
53
54       The variant returning double also conforms to SVr4, 4.3BSD.
55

SEE ALSO

57       cbrt(3), cexp2(3), exp(3), exp10(3), sqrt(3)
58

COLOPHON

60       This  page  is  part of release 5.13 of the Linux man-pages project.  A
61       description of the project, information about reporting bugs,  and  the
62       latest     version     of     this    page,    can    be    found    at
63       https://www.kernel.org/doc/man-pages/.
64
65
66
67                                  2021-03-22                           EXP2(3)
Impressum