Section: Linux Programmer's Manual (3) Updated: 2010-09-20 Local index
exp2, exp2f, exp2l - base-2 exponential function
double exp2(double x);
float exp2f(float x);
long double exp2l(long double x);
Link with -lm.
Feature Test Macro Requirements for glibc (see
_XOPEN_SOURCE >= 600 || _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L;
function returns the value of 2
raised to the power of x.
On success, these functions return the base-2 exponential value of
For various special cases, including the handling of infinity and NaN,
as well as overflows and underflows, see
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
These functions first appeared in glibc in version 2.1.
The variant returning
also conforms to
SVr4, 4.3BSD, C89.
This page is part of release 3.27 of the Linux
A description of the project,
and information about reporting bugs,
can be found at
- RETURN VALUE
- CONFORMING TO
- SEE ALSO
This document was created by
using the manual pages.
Time: 21:45:46 GMT, April 16, 2011