I don't think that that definition of round can be tacit and use under.

A tacit implementation might be:
   1&$: : ([ * <.@+~&1r2@%~)

Note also: this is a verb, not an adverb. In this definition, 1 is the
default value for x, not a control argument for :

FYI,

-- 
Raul

On Tue, Jan 22, 2013 at 11:55 AM, David Ward Lambert
<[email protected]> wrote:
>    round =: 1&$: : (dyad def '<.@:(1r2+])&.:(%&x) y')
>    assert 1 -: round 1.2
>    assert 1.25 -: 0.25 round 1.2
>
>    Round =: adverb def '<.@:(1r2+])&.:(%&m) y'
>
> Is there a tacit definition of round using under?
> What is the tacit definition of adverb Round?
> Thanks, Dave.
>
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