shigemk2 https://blog.hatena.ne.jp/shigemk2/ by shigemk2 https://www.shigemk2.com/ Haskell -- このように関数を型宣言することが出来る factorial :: Integer -> Integer factorial n = product [1..n] -- 宣言する型が Float と Double とで、結果が変わる circumference :: Float -> Float circumference r = 2 * pi * r circumference' :: Double -> Double circumference' r = 2 * pi * r Main> :t factorial factorial :: Integer -> Integer Main… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fwww.shigemk2.com%2Fentry%2F20120817%2F1345196959" title="一般的なHaskellの型 - by shigemk2" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> Hatena Blog https://hatena.blog 2012-08-17 18:49:19 rich https://www.shigemk2.com/entry/20120817/1345196959 1.0 100%