EXP
Section: Linux Programmer's Manual (3)
Updated: 20100920
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NAME
exp, expf, expl  basee exponential function
SYNOPSIS
#include <math.h>
double exp(double x);
float expf(float x);
long double expl(long double x);
Link with lm.
Feature Test Macro Requirements for glibc (see
feature_test_macros(7)):
expf(),
expl():

_BSD_SOURCE  _SVID_SOURCE  _XOPEN_SOURCE >= 600  _ISOC99_SOURCE 
_POSIX_C_SOURCE >= 200112L;
or
cc std=c99
DESCRIPTION
The
exp()
function returns the value of e (the base of natural
logarithms) raised to the power of
x.
RETURN VALUE
On success, these functions return the exponential value of
x.
If
x
is a NaN,
a NaN is returned.
If
x
is positive infinity,
positive infinity is returned.
If
x
is negative infinity,
+0 is returned.
If the result underflows,
a range error occurs,
and zero is returned.
If the result overflows,
a range error occurs,
and the functions return
+HUGE_VAL,
+HUGE_VALF,
or
+HUGE_VALL,
respectively.
ERRORS
See
math_error(7)
for information on how to determine whether an error has occurred
when calling these functions.
The following errors can occur:
 Range error, overflow

errno
is set to
ERANGE.
An overflow floatingpoint exception
(FE_OVERFLOW)
is raised.
 Range error, underflow

errno
is set to
ERANGE.
An underflow floatingpoint exception
(FE_UNDERFLOW)
is raised.
CONFORMING TO
C99, POSIX.12001.
The variant returning
double
also conforms to
SVr4, 4.3BSD, C89.
SEE ALSO
cbrt(3),
cexp(3),
exp10(3),
exp2(3),
sqrt(3)
COLOPHON
This page is part of release 3.54 of the Linux
manpages
project.
A description of the project,
and information about reporting bugs,
can be found at
http://www.kernel.org/doc/manpages/.
Index
 NAME

 SYNOPSIS

 DESCRIPTION

 RETURN VALUE

 ERRORS

 CONFORMING TO

 SEE ALSO

 COLOPHON

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Time: 19:34:17 GMT, January 18, 2018