scala reverse string with recursion

package example

object reverseS extends App{
  println("hello world")

  def reverseString(word:String): String = {
    if (word.length ==1) return word
    else {
      //println("to reverse " +word+"-first i need to reverse-" + word.tail)
      var reversed = reverseString(word.tail) + word.head
      //println("computed reverse of-"+ word)
      return reversed

    }
  }

  println(reverseString("abcde"))

}