Not like the while loop tests the loop condition in the loop header, inthe Scala language do...while a loop checks its condition at the end of the loop.
In Scala language the Notice that the conditional expression appears at the end of the loop, so the If the condition is the This process is repeated over and over again until a given condition becomes``false`` so far. The output result of executing the above code is: do...while cycle and the while loop is similar, but the do...while loop ensures that the loop is executed at least once. 8.12.1. Grammar #
while syntax of the loop:do { statement(s); } while( condition );
8.12.2. Flow chart #
statement(s) will be executed at least once before the conditionis tested. true control flow will jump back to the above do and then re-execute the statement(s) . 8.12.3. Example #
Example #
object Test { def main(args: Array[String]) { // local variable var a = 10; // do loop do{ println( "Value of a: " + a ); a = a + 1; }while( a < 20 ) } }
$ scalac Test.scala $ scala Test value of a: 10 value of a: 11 value of a: 12 value of a: 13 value of a: 14 value of a: 15 value of a: 16 value of a: 17 value of a: 18 value of a: 19