Create loops using scala function

loopunless.scala

object LoopUnlessTest extends App
{
    def loop(body: => Unit): LoopUnlessCond =
        new LoopUnlessCond(body)

    protected class LoopUnlessCond(body: => Unit)
    {
        def unless(cond: => Boolean)
        {
            body
            if(!cond) unless(cond)
        }
    }

    var i = 10
    loop
    {
        println("i = " + i)
        i -= 1
    } unless (i == 0)
}

while.scala

object WhileLoopTest extends App
{
    def whileloop(cond: => Boolean) (body: => Unit) : Unit =
    {
        if(cond)
        {
            body
            whileloop(cond)(body)
        }
    }

    var i = 10
    whileloop(i > 0)
    {
        println(i)
        i -= 1
    }
}