var i = 0
println("imperative style")
while (i < args.length) {
    println(args(i))
    i += 1
}
println("")
println("functional style")
args.foreach(arg => println(arg))
args.foreach((arg: String) => println(arg))
args.foreach(println)

println("")
println("for statement")
for (arg <- args)
    println(arg)