expm1(3)                   Library Functions Manual                   expm1(3)

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       expm1, expm1f, expm1l -
       <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?> 1

LIBRARY
       Math library (libm, -lm)

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       #include <math.h>

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

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   <?><?><?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?> <?><?><?> glibc
   (<?><?>. feature_test_macros(7)):

       expm1():
           _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
               || _XOPEN_SOURCE >= 500
               || /* <?><?><?><?><?><?><?> <?> glibc 2.19: */ _DEFAULT_SOURCE
               || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE

       expm1f(), expm1l():
           _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
               || /* <?><?><?><?><?><?><?> <?> glibc 2.19: */ _DEFAULT_SOURCE
               || /* Glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE

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           exp(x) - 1

       The result 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.

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       exp(x) - 1.

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       <?><?><?><?><?><?><?><?><?><?> +0 (-0).

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       <?><?><?><?><?><?><?><?><?><?><?><?><?>,
       <?><?><?><?><?><?><?><?><?><?><?><?> -1.

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       -HUGE_VALL, <?><?><?><?><?><?><?><?><?><?><?><?><?><?>.

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       <?><?><?><?><?><?><?><?> math_error(7), <?><?><?><?><?>
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       <?><?><?><?><?><?>:

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              <?><?><?><?><?><?><?><?> errno
              <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?> <?> ERANGE (<?><?>
              <?><?>. <?><?><?><?><?><?><?>). <?><?><?><?><?><?><?><?><?>
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              <?><?><?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?>
              <?><?><?><?><?> (FE_OVERFLOW).

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       <?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?> <?> attributes(7).

       +----------------------------+----------------------------------------------------------+--------------------------+
       |<?><?><?><?><?><?><?><?><?> | <?><?><?><?><?><?><?>                                    | <?><?><?><?><?><?><?><?> |
       +----------------------------+----------------------------------------------------------+--------------------------+
       |expm1(), expm1f(), expm1l() | <?><?><?><?><?><?><?><?><?><?><?><?> <?> <?><?><?><?><?> | MT-Safe                  |
       +----------------------------+----------------------------------------------------------+--------------------------+
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       C11, POSIX.1-2008.

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       C99, POSIX.1-2001.  BSD.

<?><?><?><?><?><?><?>
       Before glibc 2.17, on certain architectures (e.g., x86, but not x86_64)
       expm1()  raised a bogus underflow floating-point exception for some
       large negative x values (where the function result approaches -1).

       Before approximately glibc 2.11, expm1()  raised a bogus invalid
       floating-point exception in addition to the expected overflow
       exception, and returned a NaN instead of positive infinity, for some
       large positive x values.

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

<?><?>. <?><?><?><?><?>
       exp(3), log(3), log1p(3)

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       <?><?><?><?><?><?> Azamat Hackimov <azamat.hackimov@gmail.com>, Yuri
       Kozlov <yuray@komyakino.ru> <?> <?><?><?><?> <?><?><?><?><?><?>
       <pavia00@gmail.com>

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       <?><?><?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?> GNU
       <?><?><?><?><?><?> 3 <https://www.gnu.org/licenses/gpl-3.0.html>
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       <?><?><?><?><?><?> <?><?> <man-pages-ru-talks@lists.sourceforge.net>.

Linux man-pages 6.06  31 <?><?><?><?><?><?><?> 2023 <?>.              expm1(3)