10 Miscellaneous

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procedure
(atom v) → boolean
v : all

Produces t if v is anything other than a cons. Produces nil if v is a cons.

> (atom 5)
t
> (atom "watermelon")
t
> (atom t)
t
> (atom nil)
t
> (atom (cons 5 "watermelon"))
nil
> (atom (cons t nil))
nil

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