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x SuSE Linux 13.1-RELEASEx
exp2(3) Library Functions Manual exp2(3)
NAME
exp2, exp2f, exp2l - base-2 exponential function
LIBRARY
Math library (libm, -lm)
SYNOPSIS
#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
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 overflows 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).
ATTRIBUTES
For an explanation of the terms used in this section, see at-
tributes(7).
+--------------------------------------------+---------------+---------+
|Interface | Attribute | Value |
+--------------------------------------------+---------------+---------+
|exp2(), exp2f(), exp2l() | Thread safety | MT-Safe |
+--------------------------------------------+---------------+---------+
STANDARDS
C11, POSIX.1-2008.
HISTORY
glibc 2.1. C99, POSIX.1-2001.
The variant returning double also conforms to SVr4, 4.3BSD.
SEE ALSO
cbrt(3), cexp2(3), exp(3), exp10(3), sqrt(3)
Linux man-pages 6.04 2023-03-30 exp2(3)
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