Compile and Execute Scala Online

object HelloWorld {
    
   case class Book(title: String, yearPublished: Integer, author: String, isbn: String)
   
   val progInScala = Book("Programming in Scala 3rd Edition", 2016, "Martin Odersky", "0981531687")
   val funcProgInScala = Book("Functional Programming in Scala", 2014, "Paul Chiusano", "1617290653")
   val scalaCookbook = Book("Scala Cookbook", 2013, "Alvin Alexander", "1449339611")
   
   val matchCase = progInScala match {
       case Book(title, yearPublished, author, isbn) => println(s"$title <=> $yearPublished <=> $author <=> isbn")
       case _ => println("Did not match anything!")
   }
   
   val authMatch = progInScala match {
       case Book(_, yearPublished, _, _) => println(yearPublished)
       case _ => "No Author!"
   }
    
   def main(args: Array[String]) {
       val number = 10
       
       val isMatch = number match {
           case 0 => "Zero"
           case 5 => "Five"
           case 9 => "Nine"
           case _ => "No matches!"
       }
       
       println(isMatch)
   }
}