1. Re: EUPHORIA Digest - 28 Jul 1997 to 29 Jul 1997
- Posted by Jeff Zeitlin <jeff.zeitlin at EARTH.EXECNET.COM>
Jul 30, 1997
-
Last edited Jul 31, 1997
On Wed, 30 Jul 1997 00:00:08 -0500, Robert Craig wrote:
>A few days ago Jeff Zeitlin wrote:
>> There's a log function that returns the natural (base e)
>> logarithm of a number, but there's no inverse function for it -
>> i.e., there's no function that, when passed the value 1, will
>> return the value of e.
>> Yes, I know I can approximate it with 2.718281828459045, but...
>
>In some languages this function is called "exp".
>
>constant e=3D2.718281828459045
>function exp(object x)
>-- returns e to the x (inverse of Euphoria log function)
>-- x can be an atom or a sequence
> return power(e, x)
>end function
Well, yes, I had gotten that far, and I suspect that my
approximation will be more than accurate enough for ordinary use
- the point I was indirectly making was that exp() is usually a
built-in, and for all I know, it may _compute_ exp(1) rather than
having it hardcoded in there as a constant.
--=20
Jeff Zeitlin
jeff.zeitlin at earth.execnet.com
