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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | ATTRIBUTES | STANDARDS | HISTORY | SEE ALSO | COLOPHON |
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exp2(3) Library Functions Manual exp2(3)
exp2, exp2f, exp2l - base-2 exponential function
Math library (libm, -lm)
#include <math.h>
double exp2(double x);
float exp2f(float x);
long double exp2l(long double x);
Feature Test Macro Requirements for glibc (see
feature_test_macros(7)):
exp2(), exp2f(), exp2l():
_ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
These functions return the value of 2 raised to the power of x.
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).
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).
For an explanation of the terms used in this section, see
attributes(7).
┌─────────────────────────────────────┬───────────────┬─────────┐
│ Interface │ Attribute │ Value │
├─────────────────────────────────────┼───────────────┼─────────┤
│ exp2(), exp2f(), exp2l() │ Thread safety │ MT-Safe │
└─────────────────────────────────────┴───────────────┴─────────┘
C11, POSIX.1-2008.
glibc 2.1. C99, POSIX.1-2001.
The variant returning double also conforms to SVr4, 4.3BSD.
cbrt(3), cexp2(3), exp(3), exp10(3), sqrt(3)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
the project can be found at
⟨https://www.kernel.org/doc/man-pages/⟩. If you have a bug report
for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
This page was obtained from the tarball man-pages-6.9.1.tar.gz
fetched from
⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
2024-06-26. If you discover any rendering problems in this HTML
version of the page, or you believe there is a better or more up-
to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not
part of the original manual page), send a mail to
[email protected]
Linux man-pages 6.9.1 2024-05-02 exp2(3)
Pages that refer to this page: exp10(3), exp(3)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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