Man Pages

log10(3) - phpMan log10(3) - phpMan

Command: man perldoc info search(apropos)  


LOG10(3)                   Linux Programmer's Manual                  LOG10(3)



NAME
       log10, log10f, log10l -  base-10 logarithmic function

SYNOPSIS
       #include <math.h>

       double log10(double x);
       float log10f(float x);
       long double log10l(long double x);

       Link with -lm.

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

       log10f(), log10l(): _BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE; or cc -std=c99

DESCRIPTION
       The log10() function returns the base 10 logarithm of x.

RETURN VALUE
       On success, these functions return the base 10 logarithm of x.

       For special cases, including where x is 0, 1, negative, infinity, or NaN, see log(3).

ERRORS
       See  math_error(7)  for  information on how to determine whether an error has occurred when calling these func-
       tions.

       For a discussion of the errors that can occur for these functions, see log(3).

CONFORMING TO
       C99, POSIX.1-2001.  The variant returning double also conforms to SVr4, 4.3BSD, C89.

SEE ALSO
       cbrt(3), clog10(3), exp10(3), sqrt(3)

COLOPHON
       This page is part of release 3.22 of the Linux man-pages project.  A description of the project,  and  informa-
       tion about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.



                                  2008-08-05                          LOG10(3)