Hi Martin!
> (+:^:(]`(%~))) 5
>32
> (+:^:(]`*)) 5
>32
The good old Constant function 1: will give you the benefits of
less circumlocution, better results for non-positive arguments,
and coverage of array arguments:
+:^:(]`1:) (,: -) 0 1 2 5
1 2 4 32
1 0.5 0.25 0.03125
A nice puzzle, BTW. I was only capable to get to
(+:@]^:[ 1:) 5
32
on my own, ignorant of the gerund option.
Martin (the other one)
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