Racket allows programmers to add new syntactic constructs in the same way that other languages permit the formulation of procedures, methods, or classes. All you need to do is formulate a simple …

Running raco docs (or Racket Documentation on Windows or Mac OS) may open a different page with local and user-specific documentation, including documentation for installed packages.

Chapter 2 provides a brief introduction to Racket. From Chapter 3 on, this guide dives into details— covering much of the Racket toolbox, but leaving precise details to The Racket Reference and other …

The distribution includes pre-built, platform-independent bytecode; it installs much faster than plain source, and it is also compatible with fast installs of additional Racket packages.

Racket is a lexically scoped language, which means that whenever an identifier is used as an expression, something in the textual environment of the expression determines the identifier’s binding.

The Racket Guide starts with a tutorial on Racket basics, and then it describes the rest of the Racket language. Of course, you should feel free to mix and match the above two tracks, since there is …

Editors like Emacs offer a Racket or Scheme mode with similar indentation support. Re-indenting not only makes the code easier to read, it gives you extra feedback that your parentheses match in the …

Nov 23, 2025 · With the version 9.0 release, Racket includes support for shared-memory threads that can take advantage of multicore hardware and operating-systems threads to run in parallel— not …

At the same time, instead of having to say “PLT's main variant of Scheme,” programmers can now simply say “Racket” to refer to the specific descendant of Scheme that powers PLT's languages and …

Racket’s and and or are syntactic forms, rather than functions. Unlike a function, the and and or forms can skip evaluation of later expressions if an earlier one determines the answer.