NAME

     exp, log, log10, pow - exponential,  logarithmic  and  power
     functions


SYNOPSIS

     #include <math.h>

     double exp(double x);

     double log(double x);

     double log10(double x);

     double pow(double x, double y);


DESCRIPTION

     The exp() function returns the  value  of  e  (the  base  of
     natural logarithms) raised to the power of x.

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

     The log10() function returns the base-10 logarithm of x.

     The pow() function  returns the value of  x  raised  to  the
     power of y.


ERRORS

     The log() and log10() functions  can  return  the  following
     errors:

     EDOM The argument x is negative.

     ERANGE
          The argument x  is  zero.   The  log  of  zero  is  not
          defined.

     The pow() function can return the following error:

     EDOM The argument x is negative and y  is  not  an  integral
          value.  This would result in a complex number.


CONFORMING TO

     SVID 3, POSIX, BSD 4.3, ISO 9899


SEE ALSO

     sqrt(3), cbrt(3)