Chapter 6: Compound Data and Data Abstraction

Reading Input from the Keyboard

Use the built-in read procedure: (read)
which returns whatever is typed.

read acts as a parser, converting characters to numbers if necessary.

     (define prompt
       (lambda (prompt-string)
         (newline)
         (display prompt-string)
         (newline)
         (read)))

Now prompt returns whatever read returns. (prompt "Please type something now: ") Please type something now: 13 13