expm1f man page on Archlinux

Man page or keyword search:  
man Server   11224 pages
apropos Keyword Search (all sections)
Output format
Archlinux logo
[printable version]

EXPM1(3)		   Linux Programmer's Manual		      EXPM1(3)

       expm1, expm1f, expm1l - exponential minus 1

       #include <math.h>

       double expm1(double x);
       float expm1f(float x);
       long double expm1l(long double x);

       Link with -lm.

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

	   _POSIX_C_SOURCE >= 200112L;
	   or cc -std=c99
       expm1f(), expm1l():
	   _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L;
	   or cc -std=c99

       expm1(x) returns a value equivalent to

	   exp(x) - 1

       It is computed in a way that is accurate even if the value of x is near
       zero—a  case where exp(x) - 1 would be inaccurate due to subtraction of
       two numbers that are nearly equal.

       On success, these functions return exp(x) - 1.

       If x is a NaN, a NaN is returned.

       If x is +0 (-0), +0 (-0) is returned.

       If x is positive infinity, positive infinity is returned.

       If x is negative infinity, -1 is returned.

       If the result overflows, a range error occurs, and the functions return
       -HUGE_VAL, -HUGE_VALF, or -HUGE_VALL, respectively.

       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 (but see BUGS).   An  overflow  floating-
	      point exception (FE_OVERFLOW) is raised.

   Multithreading (see pthreads(7))
       The expm1(), expm1f(), and expm1l() functions are thread-safe.

       C99, POSIX.1-2001.

       For  some large negative x values (where the function result approaches
       -1), expm1() raises a bogus underflow floating-point exception.

       For some large positive x values, expm1() raises a bogus invalid float‐
       ing-point exception in addition to the expected overflow exception, and
       returns a NaN instead of positive infinity.

       Before version 2.11, the glibc implementation  did  not	set  errno  to
       ERANGE when a range error occurred.

       exp(3), log(3), log1p(3)

       This  page  is  part of release 3.65 of the Linux man-pages project.  A
       description of the project, and information about reporting  bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

				  2013-10-14			      EXPM1(3)

List of man pages available for Archlinux

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
Vote for polarhome
Free Shell Accounts :: the biggest list on the net