Chapter 1: An Introduction to Crystal
Crystal is a safe, performant, general-purpose, and object-oriented language. It was heavily inspired by Ruby's syntax and Go's and Erlang's runtimes, enabling a programmer to be very productive and expressive while creating programs that run efficiently on modern computers.
Crystal has a robust type system and can compile to native programs. Consequently, most programming errors and mistakes can be identified at compile time, giving you, among other things, null safety. Having types doesn't mean you have to write them everywhere, however. Crystal relies on its unique type interference system to identify the types of almost every variable in the program. Rare are the situations where the programmer has to ...
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