[lowka]

val s = (1 to 100).foldLeft(""){(xs, x) => xs + (x match{
    case a if x % 5 == 0 && x % 3 == 0 => "FizzBuzz"
    case b if x % 5 == 0 => "Buzz"
    case c if x % 3 == 0 => "Fizz"
    case _ => x.toString
  })
}

+++
это ничего не выводит. хм.
тогда так

(1 to 100) foreach {x => println(x match{
    case a if a % 5 == 0 && a % 3 == 0 => "FizzBuzz"
    case b if b % 5 == 0 => "Buzz"
    case c if c % 3 == 0 => "Fizz"
    case _ => x.toString
  })
}