NAME
exp2, exp2f, exp2l - base-2 exponential function
LIBRARY
Math library (libm, -lm)
SYNOPSIS
#include <math.h>double exp2(double \nx\n);\n
\nfloat exp2f(float \nx\n);\n
\nlong double exp2l(long double \nx\n);exp2(), exp2f(), exp2l():
\n
_ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112LDESCRIPTION
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 attributes(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)