How do I create a ruby Hello world?

I know in PHP you have to intrepret a page like index.php, but in Ruby how does it work? I don't know what is the Ruby extension like index.php for PHP. Could you help me?

How do you write Hello World in Ruby?

Writing Code rb that you created, you need to write a single line of code that prints the string Hello World! to your terminal. To print in Ruby, you need to use the method puts which is short for "out*put s*tring." And because Hello World! is a string, you need to surround your text with "" . puts "Hello World!"

If you are talking about a command line program this will work.

puts "Hello World"

or if you want an object oriented version

class HelloWorld    def initialize(name)       @name = name.capitalize    end    def sayHi       puts "Hello #{@name}!"    end end  hello = HelloWorld.new("World") hello.sayHi

If you are looking for a ruby on rails version of Hello World. Check the Getting Started Guide for Rails.