php man page for clog10

CLOG10(3)						     Linux Programmer's Manual							 CLOG10(3)

NAME
       clog10, clog10f, clog10l - base-10 logarithm of a complex number

SYNOPSIS
       #define _GNU_SOURCE	   /* See feature_test_macros(7) */
       #include <complex.h>

       double complex clog10(double complex z);
       float complex clog10f(float complex z);
       long double complex clog10l(long double complex z);

       Link with -lm.

DESCRIPTION
       The call clog10(z) is equivalent to:

	   clog(z)/log(10)

       or equally:

	   log10(cabs(c)) + I * carg(c) / log(10)

       The other functions perform the same task for float and long double.

       Note that z close to zero will cause an overflow.

VERSIONS
       These functions first appeared in glibc in version 2.1.

ATTRIBUTES
       For an explanation of the terms used in this section, see attributes(7).

       +-------------------------------+---------------+---------+
       |Interface		       | Attribute     | Value	 |
       +-------------------------------+---------------+---------+
       |clog10(), clog10f(), clog10l() | Thread safety | MT-Safe |
       +-------------------------------+---------------+---------+
CONFORMING TO
       These functions are GNU extensions.  The identifiers are reserved for future use in C99 and C11.

SEE ALSO
       cabs(3), cexp(3), clog(3), clog2(3), complex(7)

COLOPHON
       This  page is part of release 4.15 of the Linux man-pages 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-pages/.

								    2017-09-15								 CLOG10(3)