コードを追加する時
1 class Person
2 def initialize(name)
3 @name = name
4 end
5
6 def hello
7 "Hello, friend!\nMy name is #{@name}!"
8 end
9 end
10
11 charlie = Person.new('Charlie')
12 puts charlie.hello
13
14 # >> Hello, friend!
15 # >> My name is Charlie!
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