Tutorial by Examples

The following example declares a piece of code to be written in Racket, and then prints the string Hello, world. #lang racket "Hello, world!" Racket code can either be run directly from the command line or on the DrRacket IDE. Typing racket on the command line will start a REPL, and t...

Racket is a full-spectrum programming language. It goes beyond Lisp and Scheme with dialects that support objects, types, laziness, and more. Racket enables programmers to link components written in different dialects, and it empowers programmers to create new, project-specific dialects. Racket's li...

In Racket, we use recursion very frequently. Here is an example of a function that sums all of the numbers from zero to the parameter, n. (define (sum n) (if (zero? n) 0 (+ n (sum (sub1 n))))) Note that there are many helpful convenience based functions used here, such as ...

#lang racket (for ([path (in-directory)] #:when (regexp-match? #rx"[.]rkt$" path)) (printf "source file: ~a\n" path)) The #lang line specifies the programming language of this file. #lang racket we are using the baseline, battery-included Racket programming language. O...

The installation is very simple. If you are used to this kind of thing, just go to https://download.racket-lang.org. If you prefer, there are more detailed step-by-step installation instructions for the following systems: Installation steps (Windows) Installation steps (Linux) Installation step...