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atom

10 Miscellaneous🔗ℹ

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