• 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 

None.

*standard-output*, *terminal-io*.

None.

• Function READ-LINE
• Function WRITE-CHAR

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)) 

\issue{SUBSEQ-OUT-OF-BOUNDS} \issue{RANGE-OF-START-AND-END-PARAMETERS:INTEGER-AND-INTEGER-NIL} \issue{READ-AND-WRITE-BYTES:NEW-FUNCTIONS}