{"id":6946,"date":"2022-12-20T19:34:26","date_gmt":"2022-12-20T22:34:26","guid":{"rendered":"http:\/\/lode.uno\/linux-man\/index.php\/2022\/12\/20\/expm1-man3\/"},"modified":"2022-12-20T19:34:26","modified_gmt":"2022-12-20T22:34:26","slug":"expm1-man3","status":"publish","type":"post","link":"https:\/\/lode.uno\/linux-man\/2022\/12\/20\/expm1-man3\/","title":{"rendered":"EXPM1 (man3)"},"content":{"rendered":"

EXPM1<\/h1>\n

NAME<\/a>
SYNOPSIS<\/a>
DESCRIPTION<\/a>
RETURN VALUE<\/a>
ERRORS<\/a>
ATTRIBUTES<\/a>
CONFORMING TO<\/a>
BUGS<\/a>
SEE ALSO<\/a>
COLOPHON<\/a> <\/p>\n

\n

NAME <\/a> <\/h2>\n

expm1, expm1f, expm1l \u2212 exponential minus 1<\/p>\n

SYNOPSIS <\/a> <\/h2>\n

#include <\/b><\/p>\n

double expm1(double<\/b> x<\/i>);
float expm1f(float<\/b> x<\/i>);
long double expm1l(long double<\/b> x<\/i>);<\/b><\/p>\n

Link with \u2212lm<\/i>.<\/p>\n

Feature Test Macro Requirements for glibc (see feature_test_macros<\/b>(7)):<\/p>\n

expm1<\/b>():<\/p>\n

_ISOC99_SOURCE || _POSIX_C_SOURCE\u00a0>=\u00a0200112L
|| _XOPEN_SOURCE\u00a0>=\u00a0500
|| \/bin \/boot \/dead.letter \/dev \/etc \/home \/initrd \/lib \/lib64 \/lost+found \/media \/mnt \/opt \/proc \/release-notes.html \/release-notes.txt \/root \/run \/sbin \/srv \/sys \/tmp \/usr \/var Since glibc 2.19: bodies\/ usr\/ _DEFAULT_SOURCE
|| \/bin \/boot \/dead.letter \/dev \/etc \/home \/initrd \/lib \/lib64 \/lost+found \/media \/mnt \/opt \/proc \/release-notes.html \/release-notes.txt \/root \/run \/sbin \/srv \/sys \/tmp \/usr \/var Glibc versions <= 2.19: bodies\/ usr\/ _BSD_SOURCE || _SVID_SOURCE<\/p>\n

expm1f<\/b>(), expm1l<\/b>():<\/p>\n

_ISOC99_SOURCE || _POSIX_C_SOURCE\u00a0>=\u00a0200112L
|| \/bin \/boot \/dead.letter \/dev \/etc \/home \/initrd \/lib \/lib64 \/lost+found \/media \/mnt \/opt \/proc \/release-notes.html \/release-notes.txt \/root \/run \/sbin \/srv \/sys \/tmp \/usr \/var Since glibc 2.19: bodies\/ usr\/ _DEFAULT_SOURCE
|| \/bin \/boot \/dead.letter \/dev \/etc \/home \/initrd \/lib \/lib64 \/lost+found \/media \/mnt \/opt \/proc \/release-notes.html \/release-notes.txt \/root \/run \/sbin \/srv \/sys \/tmp \/usr \/var Glibc versions <= 2.19: bodies\/ usr\/ _BSD_SOURCE || _SVID_SOURCE<\/p>\n

DESCRIPTION <\/a> <\/h2>\n

These functions return a value equivalent to<\/p>\n

exp(x) \u2212 1<\/p>\n

The result is computed in a way that is accurate even if the value of x<\/i> is near zero\u2014a case where exp(x) \u2212 1<\/i> would be inaccurate due to subtraction of two numbers that are nearly equal.<\/p>\n

RETURN VALUE <\/a> <\/h2>\n

On success, these functions return exp(x)\u00a0\u2212\u00a01<\/i>.<\/p>\n

If x<\/i> is a NaN, a NaN is returned.<\/p>\n

If x<\/i> is +0 (\u22120), +0 (\u22120) is returned.<\/p>\n

If x<\/i> is positive infinity, positive infinity is returned.<\/p>\n

If x<\/i> is negative infinity, \u22121 is returned.<\/p>\n

If the result overflows, a range error occurs, and the functions return –HUGE_VAL<\/b>, –HUGE_VALF<\/b>, or –HUGE_VALL<\/b>, respectively.<\/p>\n

ERRORS <\/a> <\/h2>\n

See math_error<\/b>(7) for information on how to determine whether an error has occurred when calling these functions.<\/p>\n

The following errors can occur:
Range error, overflow<\/p>\n

errno<\/i> is set to ERANGE<\/b> (but see BUGS). An overflow floating-point exception (FE_OVERFLOW<\/b>) is raised.<\/p>\n

ATTRIBUTES <\/a> <\/h2>\n

For an explanation of the terms used in this section, see attributes<\/b>(7).<\/p>\n\n\n\n
<\/td>\n <\/td>\n <\/td>\n<\/td>\n<\/td>\n <\/td>\n<\/tr>\n
<\/td>\n<\/td>\n <\/td>\n<\/td>\n<\/td>\n <\/td>\n<\/tr>\n<\/table>\n

\"Image<\/p>\n

CONFORMING TO <\/a> <\/h2>\n

C99, POSIX.1-2001, POSIX.1-2008.<\/p>\n

BUGS <\/a> <\/h2>\n

Before glibc 2.17, on certain architectures (e.g., x86, but not x86_64) expm1<\/b>() raised a bogus underflow floating-point exception for some large negative x<\/i> values (where the function result approaches \u22121),<\/p>\n

Before approximately glibc version 2.11, expm1<\/b>() 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<\/i> values,<\/p>\n

Before version 2.11, the glibc implementation did not set errno<\/i> to ERANGE<\/b> when a range error occurred.<\/p>\n

SEE ALSO <\/a> <\/h2>\n

exp<\/b>(3), log<\/b>(3), log1p<\/b>(3)<\/p>\n

COLOPHON <\/a> <\/h2>\n

This page is part of release 5.10 of the Linux man-pages<\/i> project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https:\/\/www.kernel.org\/doc\/man\u2212pages\/.<\/p>\n

\n","protected":false},"excerpt":{"rendered":"

expm1, expm1f, expm1l \u2212 exponential minus 1 <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2536],"tags":[2538,2451,3007],"class_list":["post-6946","post","type-post","status-publish","format-standard","hentry","category-3-llamadas-de-bibliotecas","tag-2538","tag-expm1","tag-man3"],"gutentor_comment":0,"_links":{"self":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts\/6946","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/comments?post=6946"}],"version-history":[{"count":0,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts\/6946\/revisions"}],"wp:attachment":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/media?parent=6946"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/categories?post=6946"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/tags?post=6946"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}