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 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 …

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.

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 …

In Racket, you can use a lambda expression to produce a function directly. The lambda form is followed by identifiers for the function’s arguments, and then the function’s body expressions:

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.

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 …

Symbols in The Racket Guide introduces symbols. A symbol is like an immutable string, but symbols are normally interned, so that two symbols with the same character content are normally eq?.