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【Ruby】条件分岐 備忘録

Last updated at Posted at 2021-10-30

目的

条件分岐 備忘録

結論

とりあえず3種類あった。
if文
unless文
case文

timesメソッド #if文
a = 10
b = 20
if a > b
  puts "aはbより大きくない"
elsif a < b
  puts "aはbよりも小さい"
end
=>abより大きくない
timesメソッド #unless文
a = 10
b = 20
unless a > b
  puts "aはbより大きくない"
end
=>abより大きくない
timesメソッド #case文
array = [ "a", 1, nil ]
array.each do |item|
  case item
  when String
    puts "item is a String"
  when Numeric
    puts "item is a Numeric"
  else
    puts "item is something"
  end
end
=>item is a String
  item is a Numeric
  item is a something

参考

たのしいRuby第5版

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