log - phpMan

EXP(3)                     Linux Programmer’s Manual                    EXP(3)



NAME
       log, logf, logl - natural logarithmic function

SYNOPSIS
       #include <math.h>

       double log(double x);

       float logf(float x);

       long double logl(long double x);

DESCRIPTION
       The log() function returns the natural logarithm of x.

ERRORS
       The log() function can return the following errors:

       EDOM   The argument x is negative.

       ERANGE The argument x is zero.  The log of zero is not defined (minus infinity).

CONFORMING TO
       SVID  3,  POSIX, BSD 4.3, ISO 9899.  The float and the long double variants are C99
       requirements.

SEE ALSO
       sqrt(3), cbrt(3)



                                  2002-07-27                            EXP(3)

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