Re: Classic game LUNAR and G=1E-03

["Michael J. Mahon" <mjmahon@aol.com>]

Michael J. Mahon wrote:
> Nama wrote:
> > Sorry this message is slightly off topic.
> >
> > I am tying to convert the following classic Lunar lander game (to non-
> > apple basic actually)
> >
> > http://www.moorecad.com/classicbasic/basic/creative/lunar.bas
> >
> > ...and I am stumped at line 140. Specifically where is says G=1E-03.
> > 1E-03 appears again at line 160 and 170
> > Can anyone help me with what 1E-03 means, and if there is another way
> > to express it?
> >
> > Thanks in advance.
>
> 1e-03 or 1e-3 are valid ways to write constants in Applesoft as
> well as in most other BASICs, meaning 1*10^-3.
>
> BASIC also prints small (and very large) numbers in this form,
> often called scientific notation--essentially "floating-point
> in print".  ;-)

BTW, does anyone recognize these power series?  The first is:

    Sum (n=1 to 5) (x^n/n)

and the second is:

    Sum (n=1 to 5) (x^n/(n*(n+1)))

These remind me of Taylor expansions of some simple functions, truncated
at the 5th power...

-michael

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