450 // A return expression, when evaluated, abandons the 

   450 // A return expression, when evaluated, abandons the 

   451 // current computation and returns to the caller of the 

   451 // current computation and returns to the caller of the 

   452 // function in which return appears."

   452 // function in which return appears."

   453 

   453 

   454 def sq1(x: Int): Int = x * x

   454 def sq1(x: Int): Int = x * x

   455 def sq2(x: Int): Int = return x * x

   461 def sq2(x: Int): Int = return x * x

   456 

   462 

   457 def sumq(ls: List[Int]): Int = {

   463 def sumq(ls: List[Int]): Int = {

   458   ls.map(sq1).sum[Int]

   464   ls.map(sq1).sum[Int]

   459 }

   465 }

   465 def sumq(ls: List[Int]): Int = {

   471 def sumq(ls: List[Int]): Int = {

   466   val sqs : List[Int] = for (x <- ls) yield (return x * x)

   472   val sqs : List[Int] = for (x <- ls) yield (return x * x)

   467   sqs.sum

   473   sqs.sum

   468 }

   474 }

   469 

   475 

   470 

   477 

   471 

   478 

   472 

   479 

   473 // Type abbreviations

   480 // Type abbreviations

   474 //====================

   481 //====================