str1 = "string" str2 = "string" puts str1.object_id #19423512 puts str2.object_id #19423500 puts(str1 == str2) #true puts "string".class #String puts str1.length #6 str1 << "hoge" puts str1.length #10 (1..100).each do |i| case i % 15 when …

2040704 午前の勉強