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@qfoqfo

rubyの数値オブジェクトについて

Last updated at Posted at 2019-10-31

数値

p 4.8.class #何クラスに属しているのか見れる
p 4.8.methods #どんなメソッドをもっているのか

  • p 10 + 3 #足し算
  • p 10 * 3 #引き算
  • p 10 - 3 #引き算
  • p 10 / 3 #3
  • p 10 % 3 #1
  • p 10.0 / 3 #3.33333
  • p Rational(2,5) + Rational(3,4) #分数
  • p 2/5r + 3/4r　#上記分数簡単に書いたもの
  • p 56.3 round #四捨五入
  • p 56.3 floor #小数点以下切り捨て
  • p 56.3 ceil #小数点以下切り上げ
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