map```scala def main(args: Array[String]): Unit = { val map1

def main(args: Array[String]): Unit = {
  val map1=scala.collection.mutable.Map((42->"湖北省"),(14 -> "山西省"))
  map1+=(19 -> "河南省")
  map1-=42
  val ret=map1.get(14)
  if (ret.isDefined){
    println(ret.get)
  }
  println(map1)
  for ((key,value)<-map1){
    println(s"${value}身份证前两位号是${key}")
  }
}