zl:1 - FTP

71 ceiling
(cdr '(a b c» => (b c)
Officially cdr is applicable only to conses and locatives. However, as a
matter of convenience, cdr of nil returns nil.
Note that cdr is not the right way to read hardware registers, since cdr
will in some cases start a block-read and the second read could easily read
some register you did not want it to. Therefore, you should use car or
sys:%p-Idb as appropriate for these operations.
For a table of related items: See the section "Functions for Extracting
From Lists" in Symbolics Common Lisp: Language Concepts.
I
ceiling number &optional (divisor 1) Function
Divides number by divisor, and truncates the result toward positive infinity.
The truncated result and the remainder are the returned values.
number and divisor must each be a noncomplex number. Not specifying a
divisor is exactly the same as specifying a divisor of 1.
If the two returned values are Q and R, then (+ (. Q divisor) R) equals
number. If divisor is 1, then Q and R add up to number. If divisor is 1
and number is an integer, then the returned values are number and o.
The first returned value is always an integer. The second returned value
is integral if both arguments are integers, is rational if both arguments are
rational, and is floating-point if either argument is floating-point. If only
one argument is specified, then the second returned value is always a number
of the same type as the argument.