Warning: The following versions of Ruby have reached End of Life and are no longer supported
• 2.5• 2.4• 2.3A String object holds and manipulates an arbitrary sequence of bytes, typically representing characters.
Represent whole numbers in Ruby
Arrays are ordered, integer-indexed collections of any object.
A Hash is a dictionary-like collection of unique keys and their values.
Symbol objects represent names and some strings inside the Ruby interpreter.
The Kernel module is included by class Object, so its methods are available in every Ruby object.