Hi Skip and Raul,

Thanks very much for the advice. Getting much clearer now.


On Tue, 19 Oct 2021 at 08:05, Jon Quant <[email protected]> wrote:

> Hi all,
>
> The J phrases book has simple uses of colon which I can't find in the
> NuVoc grammar.
> Could someone help explain the grammar of the following?
>
> Verb trains:
>
> even=: 2: * i.
> odd=: 1: + 2: * i.
>
> These seem to work without the colons anyway. What is the grammar rule and
> purpose for an integer followed by a colon?
>
> Great fun so far with J!
>
> Thanks
>
> Jon
>
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