Typed Racket is Racket's gradually-typed sister language which lets you add statically-checked type annotations to your programs. For more information, see the Typed Racket Guide.
Typed Racket is bundled in the default Racket distribution, which you can download from Racket's download page.
You can also manually install it from the main package catalog with the following command:
raco pkg install typed-racket
- Guide: http://docs.racket-lang.org/ts-guide/index.html
- Reference: http://docs.racket-lang.org/ts-reference/index.html
The documentation is also bundled in your local copy of Typed Racket.
Racket, including these packages, is free software, see LICENSE for more details.