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LOOP

( loop < sequence of forms > )

where one form is ( return < val > )

( loop

( when ( null L ) ( return NIL ) )

( print ( car L ) )

( setf L ( cdr L ) )

)

-- loops can be more efficient

-- people like loops

-- but they involve assignment and thus side effects

a

b

c

L

L

L

NIL

L

1.44

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