Ternary Operators in Scala : 1.5

How to use ternary operator in scala.

I would like to simplify this:

 var countA: Int = 0
  var countB: Int = 0

   if (itemList > 0) {
        countB = 1
      } else {
        countA = 1
      }
    } else {
      countB = 1
    }
  } else {
    countA = 1
  }

How do I use ternary operators in scala.