Flag Loops

Use a boolean flag to stop a loop early.

FlagLoop.scala

object Main {
  def main(args: Array[String]): Unit = {
    val target = 
    var current = 1
    var checks = 0
    var found = false

    while (current <= 4 && !found) {
      checks = checks + 1
      if (current == target) {
        found = true
      } else {
        current = current + 1
      }
    }

    val status = if (found) "found" else "missing"

    println("target=" + target)
    println("checks=" + checks)
    println("status=" + status)
  }
}

object Main {
  def main(args: Array[String]): Unit = {
    val target = 
    var current = 1
    var checks = 0
    var found = false

    while (current <= 4 && !found) {
      checks = checks + 1
      if (current == target) {
        found = true
      } else {
        current = current + 1
      }
    }

    val status = if (found) "found" else "missing"

    println("target=" + target)
    println("checks=" + checks)
    println("status=" + status)
  }
}

flag-loop A boolean flag can record when a search is finished. The loop condition can then stop without using a special break statement.