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



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

SYNOPSIS
       #include<math.h>

       doubleexp(double x);

       doublelog(double x);

       doublelog10(double x);

       doublepow(double x,double y);

DESCRIPTION
       The  exp()  function  returns the value of e (the base of natural loga-
       rithms) 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.

CONFORMINGTO
       SVID 3, POSIX, BSD 4.3, ISO 9899

SEEALSO
       sqrt(3), cbrt(3)



GNU                               1993-06-16                            EXP(3)