Default Cases

Handle unlisted values with a catch-all case.

DefaultCase.scala

object Main {
  def main(args: Array[String]): Unit = {
    val code = 
    val label = code match {
      case 1 => "one"
      case 2 => "two"
      case _ => "code:" + code
    }

    println("code=" + code)
    println("label=" + label)
  }
}

object Main {
  def main(args: Array[String]): Unit = {
    val code = 
    val label = code match {
      case 1 => "one"
      case 2 => "two"
      case _ => "code:" + code
    }

    println("code=" + code)
    println("label=" + label)
  }
}

object Main {
  def main(args: Array[String]): Unit = {
    val code = 
    val label = code match {
      case 1 => "one"
      case 2 => "two"
      case _ => "code:" + code
    }

    println("code=" + code)
    println("label=" + label)
  }
}

default-case The `_` case matches anything the earlier cases missed. Its body can still read the original value to build a fallback result.