- Scheme Procedure:
**first**`pair`¶ - Scheme Procedure:
**second**`pair`¶ - Scheme Procedure:
**third**`pair`¶ - Scheme Procedure:
**fourth**`pair`¶ - Scheme Procedure:
**fifth**`pair`¶ - Scheme Procedure:
**sixth**`pair`¶ - Scheme Procedure:
**seventh**`pair`¶ - Scheme Procedure:
**eighth**`pair`¶ - Scheme Procedure:
**ninth**`pair`¶ - Scheme Procedure:
**tenth**`pair`¶ These are synonyms for

`car`

,`cadr`

,`caddr`

, ….

- Scheme Procedure:
**car+cdr**`pair`¶ Return two values, the CAR and the CDR of

`pair`.

(car+cdr '(0 1 2 3)) ⇒ 0 (1 2 3)

- Scheme Procedure:
**take**`lst i`¶ - Scheme Procedure:
**take!**`lst i`¶ Return a list containing the first

`i`elements of`lst`.`take!`

may modify the structure of the argument list`lst`in order to produce the result.

- Scheme Procedure:
**drop**`lst i`¶ Return a list containing all but the first

`i`elements of`lst`.

- Scheme Procedure:
**take-right**`lst i`¶ Return a list containing the

`i`last elements of`lst`. The return shares a common tail with`lst`.

- Scheme Procedure:
**drop-right**`lst i`¶ - Scheme Procedure:
**drop-right!**`lst i`¶ Return a list containing all but the

`i`last elements of`lst`.`drop-right`

always returns a new list, even when`i`is zero.`drop-right!`

may modify the structure of the argument list`lst`in order to produce the result.

- Scheme Procedure:
**split-at**`lst i`¶ - Scheme Procedure:
**split-at!**`lst i`¶ Return two values, a list containing the first

`i`elements of the list`lst`and a list containing the remaining elements.`split-at!`

may modify the structure of the argument list`lst`in order to produce the result.

- Scheme Procedure:
**last**`lst`¶ Return the last element of the non-empty, finite list

`lst`.