Input / Output

Input / Output or I/O is the way in which the computer communicates with the outside world.

(write obj)
(display obj)
These functions write the external representation of obj to the output port. write writes a form that can be read back in by Scheme; for example, a string will be enclosed in "". display writes the external form without any extra characters.

> (begin (write "Foo") (newline))

> (begin (display "Foo") (newline)) Foo #f

(newline) writes a newline character.

(write-char char) writes the single character char.

Each of these functions can optionally have a port as an additional argument.

Contents    Page-10    Prev    Next    Page+10    Index