SYNOPSIS<\/a>
DESCRIPTION<\/a>
RETURN VALUE<\/a>
ERRORS<\/a>
ATTRIBUTES<\/a>
CONFORMING TO<\/a>
SEE ALSO<\/a>
COLOPHON<\/a> <\/p>\n
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NAME <\/a> <\/h2>\nexp, expf, expl \u2212 base-e exponential function<\/p>\n
SYNOPSIS <\/a> <\/h2>\n#include <\/b><\/p>\ndouble exp(double<\/b> x<\/i>);
float expf(float<\/b> x<\/i>);
long double expl(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
expf<\/b>(), expl<\/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>\nThese functions return the value of e (the base of natural logarithms) raised to the power of x<\/i>.<\/p>\nRETURN VALUE <\/a> <\/h2>\nOn success, these functions return the exponential value of x<\/i>.<\/p>\n
If x<\/i> is a NaN, a NaN is returned.<\/p>\n
If x<\/i> is positive infinity, positive infinity is returned.<\/p>\n
If x<\/i> is negative infinity, +0 is returned.<\/p>\n
If the result underflows, a range error occurs, and zero 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>\nERRORS <\/a> <\/h2>\nSee 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>. An overflow floating-point exception (FE_OVERFLOW<\/b>) is raised.<\/p>\n
Range error, underflow<\/p>\n
errno<\/i> is set to ERANGE<\/b>. An underflow floating-point exception (FE_UNDERFLOW<\/b>) is raised.<\/p>\nATTRIBUTES <\/a> <\/h2>\nFor an explanation of the terms used in this section, see attributes<\/b>(7).<\/p>\n\n\n<\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n<\/tr>\n \n<\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n<\/tr>\n<\/table>\n![\"Image](\"grohtml-1624411.png\")
<\/p>\n
CONFORMING TO <\/a> <\/h2>\nC99, POSIX.1-2001, POSIX.1-2008.<\/p>\n
The variant returning double<\/i> also conforms to SVr4, 4.3BSD, C89.<\/p>\nSEE ALSO <\/a> <\/h2>\n
#include double exp(double<\/b> x<\/i>); Link with \u2212lm<\/i>.<\/p>\n Feature Test Macro Requirements for glibc (see feature_test_macros<\/b>(7)):<\/p>\n expf<\/b>(), expl<\/b>():<\/p>\n _ISOC99_SOURCE || _POSIX_C_SOURCE\u00a0>=\u00a0200112L These functions return the value of e (the base of natural logarithms) raised to the power of x<\/i>.<\/p>\n On success, these functions return the exponential value of x<\/i>.<\/p>\n If x<\/i> is a NaN, a NaN is returned.<\/p>\n If x<\/i> is positive infinity, positive infinity is returned.<\/p>\n If x<\/i> is negative infinity, +0 is returned.<\/p>\n If the result underflows, a range error occurs, and zero 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 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: errno<\/i> is set to ERANGE<\/b>. An overflow floating-point exception (FE_OVERFLOW<\/b>) is raised.<\/p>\n Range error, underflow<\/p>\n errno<\/i> is set to ERANGE<\/b>. An underflow floating-point exception (FE_UNDERFLOW<\/b>) is raised.<\/p>\n For an explanation of the terms used in this section, see attributes<\/b>(7).<\/p>\n C99, POSIX.1-2001, POSIX.1-2008.<\/p>\n The variant returning double<\/i> also conforms to SVr4, 4.3BSD, C89.<\/p>\n
float expf(float<\/b> x<\/i>);
long double expl(long double<\/b> x<\/i>);<\/b><\/p>\n
|| \/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>\nDESCRIPTION <\/a> <\/h2>\n
RETURN VALUE <\/a> <\/h2>\n
ERRORS <\/a> <\/h2>\n
Range error, overflow<\/p>\nATTRIBUTES <\/a> <\/h2>\n
\n
\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n<\/tr>\n \n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n<\/tr>\n<\/table>\n <\/p>\nCONFORMING TO <\/a> <\/h2>\n
SEE ALSO <\/a> <\/h2>\n