Preparation

• Save the following as hello.rkt

#lang racket
(display "hello world")

Command Line

• run the program with

    $ racket hello.rkt
  

• There's a kindof obvious bug. Figure how to fix the bug. There's a few options.

• use the time command

    $ time racket hello.rkt
  

• Now compile the code with

    $ raco make hello.rkt
  

• Time it again. What do you observe?

DrRacket: A Racket Specific IDE

• Start DrRacket from the activities menu

• Referring to the DrRacket documentation as needed, open and run the hello.rkt program from the previous part.

REPL

• The bottom window of DrRacket allows the interactive evaluation of racket expressions.

• If you prefer working on the command line, you can just invoke

    $ racket
  

• There are some extra commands available in the command line REPL.