Man page - exp2l(3)

Packages contains this manual

Package: manpages-dev
apt-get install manpages-dev

Manuals in package:

en fr ja ru ro de

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).

Image grohtml-426585-1.png

C11, POSIX.1-2008.

glibc 2.1. C99, POSIX.1-2001.

The variant returning double also conforms to SVr4, 4.3BSD.