In article <4146acd5@news.povray.org> , Warp <war### [at] tagpovrayorg> wrote:
> I didn't know user-defined functions supported recursion or iteration...
You can view "sum" and "prod" as iterations...
Thorsten
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Thorsten Froehlich, Duisburg, Germany
e-mail: tho### [at] trfde
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