class Range: A \Range object represents a collection of values that are between given begin and end values. literals.| docs.ruby-lang.org
class Integer: An \Integer object represents an integer value. literals.| docs.ruby-lang.org
class String: A +String+ object has an arbitrary sequence of bytes, typically representing text or binary data. new or as literals.| docs.ruby-lang.org
class Object: Object is the default root of all Ruby objects. Object inherits from BasicObject which allows creating alternate object hierarchies.| docs.ruby-lang.org
class Float: A \Float object represents a sometimes-inexact real number using the native architecture's double-precision floating point representation. Floating po| docs.ruby-lang.org