Question

In a for loop in my Scala code, i want to skip to the beginning of the loop and not execute following statements if a particular condition is true. In Java i can use ‘continue’ for doing this. But ‘continue’ does not seem to work in Scala.
So how can i skip to the beginning of my loop in a Scala program ?

Please Help
Thank You.

Answer 1

If you’re using Scala 2.7, from http://www.scala-lang.org/node/257

These keywords are not included in Scala 2.7, and must be implemented in a different way. For break, the simplest thing to do is to divide your code into smaller methods and use the return to exit early. For continue, a simple approach is to place the skipped-over parts of a loop into an if.
Scala 2.8 will include break, but not continue.

If you’re using Scala 2.8

import util.control.Breaks._
// for continue, write this somewhere in your program
val continue = new Breaks
/* use like */
Breaks.breakable {
  for (i <- 1 to 10)
  continue.breakable { if (i % 2 == 0) continue.break; println(i); if (i == 7) Breaks.break }
}


//source http://daily-scala.blogspot.com/2010/04/breaks.html

Note that normally needing break and continue means that you aren’t being as functional as Scala would like you to be.