Explanation about Ruby Range object

What is a Range object?

An object that handles a range of values. For example, when expressing 1 to 3, it is expressed as follows.

irb(main):001:0> 1..3
=> 1..3
irb(main):002:0> (1..3).class
=> Range

You can also convert it to an array using a method called to_a.

irb(main):003:0> (1..3).to_a
=> [1, 2, 3]
irb(main):004:0> (1..3).to_a.class
=> Array

By the way, if you set 3 dots, you can create a Range object that does not include the last value.

irb(main):006:0> (1...3).to_a
=> [1, 2] 

You can also create a Range object for the alphabet.

irb(main):011:0> ('a'..'e').to_a
=> ["a", "b", "c", "d", "e"]

Retrieving the value of a Range object

Like an array, each method can be used to expand and retrieve each value.

irb(main):016:0> (1..5).each { |i| puts "#{i}" }
=> 1..5

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