Ruby

Dynamic, object-oriented language focused on simplicity and productivity

Overview

Ruby is an elegant, dynamic programming language with a focus on simplicity and productivity. Known for its readable syntax and powerful metaprogramming capabilities, Ruby is widely used for web development (Ruby on Rails), scripting, and automation.

With run, you can execute Ruby code instantly using the Ruby interpreter. The Ruby engine provides a stateful REPL where variables, methods, and classes persist across commands.

Language Aliases

Supported Aliases

run ruby "puts 'Hello'"
run rb "puts 'Hello'"
run irb "puts 'Hello'"

Output

Hello
Hello
Hello

Basic Usage

Simple Output

run ruby "puts 'Hello, World!'"

Output

Hello, World!

Variables and Interpolation

run ruby "name = 'Alice'; puts "Hello, #{name}!""

Output

Hello, Alice!

Arrays and Iteration

run ruby "[1, 2, 3, 4, 5].each { |n| puts n * 2 }"

Output

REPL Behavior

Ruby's REPL is STATEFUL - variables and methods persist across commands.