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write-string string &optional output-stream &key start end ⇒ string
write-line string &optional output-stream &key start end ⇒ string
string—a string.
output-stream – an output stream designator. The default is standard output.
start, end—bounding index designators of string. The defaults for start and end are 0 and nil, respectively.
write-string writes the characters of the subsequence of string bounded by start and end to output-stream. write-line does the same thing, but then outputs a newline afterwards.
(prog1 (write-string "books" nil :end 4) (write-string "worms"))
|> bookworms
⇒ "books"
(progn (write-char #\*)
(write-line "test12" *standard-output* :end 5)
(write-line "*test2")
(write-char #\*)
nil)
|> *test1
|> *test2
|> *
⇒ NIL
*standard-output*, *terminal-io*.
write-line and write-string return string, not the substring bounded by start and end.
(write-string string)
≡ (dotimes (i (length string)
(write-char (char string i)))
(write-line string)
≡ (prog1 (write-string string) (terpri))