Try Ruby on your browser!

If you are ready to spent a 15 minutes of free time, it's enough to learn ruby. Ruby is Japanese brain and quite easy also. It is famous in its simplicity. You need not install ruby to try it, you can do it in your browser- Not joke!
Just navigate to the official website of ruby.


On the sidebar, you have a wonderful tutorial "Ruby in twenty minutes" to start with. Put a click on "Try ruby on browser" -circled in the above screenshot. Then you will get a command prompt like screen on your browser. Then now ruby is ready to what you want!
If you are beginner, type 'help' on the prompt and hit enter. Then the 'virtual' ruby navigate you through an interactive tutorial which is very useful for beginners. The tutorial takes only about 15minutes.