Scala Basics - Functions

You can define function with "def"

scala> def pageVisitCount(session: Int): Int = session + 1 pageVisitCount: (session: Int)Int scala> var totalPageCount = pageVisitCount(1) totalPageCount: Int = 2 scala> def message() = "Hello Scala" message: ()java.lang.String scala> message() res0: java.lang.String = Hello Scala scala> message res1: java.lang.String = Hello Scala

Even you can able to call function without parenthesis if it doesn't have arguments.