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|    507 List(1, 2, 3) contains "your mom" |    507 List(1, 2, 3) contains "your mom" | 
|    508  |    508  | 
|    509 // I like best about Scala that it lets me often write |    509 // I like best about Scala that it lets me often write | 
|    510 // concise, readable code. |    510 // concise, readable code. | 
|    511  |    511  | 
|         |    512  | 
|         |    513  | 
|         |    514 // You can define your own while loop | 
|         |    515  | 
|         |    516  | 
|         |    517 def my_while(condition: => Boolean)(block: => Unit): Unit =  | 
|         |    518   if (condition) { block ; my_while(condition) { block } } else { } | 
|         |    519  | 
|         |    520  | 
|         |    521 var x = 10 | 
|         |    522 my_while (x > 0) {  | 
|         |    523   println(s"$x") ; x = x - 1  | 
|         |    524 } | 
|         |    525  | 
|         |    526  | 
|         |    527 `symbol | 
|         |    528 `symbol` |