log

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  vari-
       ants are C99 requirements.

SEE ALSO
       sqrt(3), cbrt(3)



                                  2002-07-27                            EXP(3)