Question

I keep getting this error when writing a simple recursive function in Scala. What am I missing?

scala> def count(n1:Int, n1:Int) : List[Int] = (n1 < n2) ? List() : List(n1, count((n1 - 1), n2))
<console>:1: error: ';' expected but '(' found.
   def count(n1:Int, n1:Int) : List[Int] = (n1 < n2) ? List() : List(n1, count((n1 - 1), n2))

Answer 1

In Scala the ternary operator is if. So, ? and : can be replaced with the usual if and else keywords.

Also, where is n2 defined? I’ll guess in countlike this def count(n1:Int, n2:Int) : List[Int] = ...