EXP2(3) - man page online | library functions

Base-2 exponential function.

EXP2(3)                             Linux Programmer's Manual                             EXP2(3)

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 These functions return 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 over‐ flows 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.
ATTRIBUTES For an explanation of the terms used in this section, see attributes(7). ┌─────────────────────────┬───────────────┬─────────┐ │Interface │ Attribute │ Value │ ├─────────────────────────┼───────────────┼─────────┤ │exp2(), exp2f(), exp2l() │ Thread safety │ MT-Safe │ └─────────────────────────┴───────────────┴─────────┘
CONFORMING TO C99, POSIX.1-2001, POSIX.1-2008. 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 4.04 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at
2015-04-19 EXP2(3)
This manual Reference Other manuals
exp2(3) referred by exp(3) | exp10(3)
refer to attributes(7) | cbrt(3) | cexp2(3) | exp(3) | exp10(3) | feature_test_macros(7) | math_error(7) | sqrt(3)