Is everything an object in ruby?

Question

Is everything in ruby an object? Does this include Fixnums?

Answer 1

Yes. Fixnum is a class, which inherits from Integer, which inherits from Numeric, which finally inherits from Object.

Or, why don't you just ask it? :)

1.is_a? Object # => true
1.class # => Fixnum
Fixnum.is_a? Object # => true

Reading the Ruby info and documentation on the website is a good idea too.