eintr: Numbers Lists
Numbers, Lists inside of Lists
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Lists can also have numbers in them, as in this list: ‘(+ 2 2)’. This
list has a plus-sign, ‘+’, followed by two ‘2’s, each separated by
whitespace.
In Lisp, both data and programs are represented the same way; that
is, they are both lists of words, numbers, or other lists, separated by
whitespace and surrounded by parentheses. (Since a program looks like
data, one program may easily serve as data for another; this is a very
powerful feature of Lisp.) (Incidentally, these two parenthetical
remarks are _not_ Lisp lists, because they contain ‘;’ and ‘.’ as
punctuation marks.)
Here is another list, this time with a list inside of it:
'(this list has (a list inside of it))
The components of this list are the words ‘this’, ‘list’, ‘has’, and
the list ‘(a list inside of it)’. The interior list is made up of the
words ‘a’, ‘list’, ‘inside’, ‘of’, ‘it’.
Info Catalog
eintr: Lisp Lists
eintr: Lisp Atoms