do-while Loop

do-while Loop

A do { ... } while (condition) loop checks its condition *after* running the body, guaranteeing the body executes at least once -- unlike while, which may skip the body entirely. This construct is deprecated as of Scala 2.13 in favor of restructuring code with while or recursion, though it still compiles with a deprecation warning. It's useful to recognize in older Scala code even if avoided in new code.

Warning: do-while is deprecated since Scala 2.13 -- prefer a while loop with the condition check moved inside, or use recursion instead.

Example: do-while Loop

object Main extends App {
  var count = 0

  do {
    println(s"Running iteration $count")
    count += 1
  } while (count < 3)
}