Factorial in Scala

Example for versions Scala 2.7.7-final

This example uses iterative factorial definition. 

object Factorial {
    def main(args: Array[String]) {
        var f = BigInt(1)
        format("0! = %s\n", f)
        for {i <- 1 to 16} {
             f *= i;
             format("%s! = %s\n", i, f)
        }
    }
}