Crystal Programming Language

Crystal Programming Language

This is the documentation for the Crystal programming language.

Crystal is a programming language with the following goals:

  • Have a syntax similar to Ruby (but compatibility with it is not a goal)
  • Be statically type-checked, but without having to specify the type of variables or method arguments.
  • Be able to call C code by writing bindings to it in Crystal.
  • Have compile-time evaluation and generation of code, to avoid boilerplate code.
  • Compile to efficient native code.


$ npm install -g gitbook-cli
$ gitbook build --gitbook=2.3.2

Html output will be in _book folder.


Do you consider yourself a helpful person? If you find bugs or sections which need more clarification you're welcome to contribute to this documentation. You can submit a pull request to this repository:

Thank you very much!