# clog10 man page

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

## Referenced By

cexp2(3), clog(3), clog2(3), complex(7), log10(3).

Explore man page connections for clog10(3).

clog10f(3) and clog10l(3) are aliases of clog10(3).