log10(3) Linux Man Page - System Grab Bag

Name

log10, log10f, log10l - base-10 logarithmic function

Library

Math library ( libm ", " -lm )

Synopsis

#include <math.h> 
double log10(double  x );
float log10f(float  x );
long double log10l(long double  x );

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

log10f() log10l()

    _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
        || /* Since glibc 2.19: */ _DEFAULT_SOURCE
        || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE

Description

These functions return 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 functions.

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

Attributes

For an explanation of the terms used in this section, see attributes(7). allbox; lbx lb lb T{ log10()log10f()log10l()

Interface	Attribute	Value
T}	Thread safety	MT-Safe

Standards

C11, POSIX.1-2008.

History

C99, POSIX.1-2001.

The variant returning double also conforms to SVr4, 4.3BSD, C89.