racket

TLDR

Start REPL

$ racket

Run script

$ racket [script.rkt]

Evaluate expression

$ racket -e "(+ 1 2 3)"

Run with specific language

$ racket -l [typed/racket] [script.rkt]

Interactive with file

$ racket -it [script.rkt]

Compile to bytecode

$ raco make [script.rkt]

Create executable

$ raco exe [script.rkt]

SYNOPSIS

racket [-e expr] [-l lang] [-it] [options] [file] [args]

racket is the main implementation of Racket, a general-purpose programming language in the Lisp/Scheme family.
The language emphasizes language-oriented programming. The #lang directive at file start selects the language: racket, typed/racket, scribble, and many others.
The REPL provides interactive development. Tab completion, history, and inline documentation support exploratory programming.
raco is the Racket command tool for package management, compilation, documentation, and other tasks. It extends Racket's capabilities.
Typed Racket adds optional static typing. Type annotations catch errors at compile time while maintaining Racket's expressiveness.
The DrRacket IDE provides a graphical environment with debugging, profiling, and educational features.

PARAMETERS

-e EXPR

Evaluate expression.

-l LANG

Use language.

-f FILE

Load file.

-t FILE

Require file.

-i

Interactive mode.

-it FILE

Load and interact.

-I LANG

Set language and interact.

-m, --main

Run main submodule.

-v, --version

Show version.

-h, --help

Show help.

End options.

CAVEATS

Different from standard Scheme in some areas. Package system requires network access. Large standard distribution.

HISTORY

Racket evolved from PLT Scheme, which began at Rice University in 1995. The name changed to Racket in 2010 to reflect its evolution beyond Scheme. It's widely used in programming language research and education.