hello.rs

# This program displays "Hello world!"
#
# References:
#     https://en.wikibooks.org/wiki/Ruby_Programming/Hello_world

puts 'Hello world!'

Try It

Copy and paste the code above into one of the following free online development environments or use your own Ruby compiler / interpreter / IDE.

• CodeChef
• Ideone
• paiza.IO
• PythonTutor
• repl.it
• TutorialsPoint

See Also

• Wikibooks: Ruby Programming/Hello world