run

Crystal

Fast as C, slick as Ruby

Overview

Crystal is a compiled language with Ruby-like syntax and static type checking. It aims to combine the elegance of Ruby with the performance of C.

Language Aliases

Supported Aliases
run crystal "puts "Hello""
run cr "puts "Hello""
run crystal-lang "puts "Hello""
Output
Hello
Hello
Hello

REPL Behavior

Crystal's REPL maintains state across commands. Variables, methods, and classes persist within the same REPL session.