JavaNoobPig

fun main(args:Array<String>){
    //var_declarations()
    ranges()
}
fun ranges(){
    val a: IntProgression =1.rangeTo(10).reversed()
    for(x in a) println(x)
    println("sum  of ints $a = ${a.sum()}")

    var b =10.downTo(1)

JavaNoobPig

fun main(args:Array<String>){
    //var_declarations()
    ranges()
}
fun ranges(){
    val a: IntProgression =1.rangeTo(10).reversed()
    for(x in a) println(x)
    println("sum  of ints $a = ${a.sum()}")

    var b =10..1

JavaNoobPig

fun main(args:Array<String>){
    //var_declarations()
    ranges()
}
fun ranges(){
    val a: IntProgression =1.rangeTo(10).reversed()
    for(x in a) println(x)
    println("sum  of ints $a = ${a.sum()}")
}

JavaNoobPig

fun main(args:Array<String>){
    //var_declarations()
    ranges()
}
fun ranges(){
    val a: IntProgression =1.rangeTo(10).reversed()
    for(x in a) println(x)
}

JavaNoobPig

fun main(args:Array<String>){
    //var_declarations()
    ranges()
}
fun ranges(){
    val a=1.rangeTo(10) //1,2,3......,10
    for(x in a) println(x)
}

JavaNoobPig

fun main(args:Array<String>){
    //var_declarations()
    ranges()
}
fun ranges(){
    val a:IntRange=1..10 //1,2,3......,10
    for(x in a) println(x)
}
//var_declarations()在下面我就不貼了  以下略

JavaNoobPig

fun main(args:Array<String>){
    var_declarations()
}
fun var_declarations(){
    val a=64
    val b=123
    val c=2.3f  ///或F
    val d=12.3e5
    println(" $a $b $c $d")
    val e:Int;  //只有e這邊宣告又沒給值的,一定要給形別

JavaNoobPig

fun main(args:Array<String>){
    var_declarations()
}

fun var_declarations(){
    val a:Int=64
    val b:Long=123
    val c:Float=2.3f  ///或F
    val d:Double=12.3e5
    println(" $a $b $c $d")

JavaNoobPig

fun main(args:Array<String>){  //fun main為程式進入點  ,某版本後可以直接寫fun main(){}  不用寫args:Array<String>
    var_declarations()  //呼叫執行Function
}

fun var_declarations(){
    val a:Int=64      //val為常數宣告  var才是變數宣告
    val b:Long=123
    val c:Float=2.3f
    val d:Double=12.3e5
    println(" $a $b $c $d")   //支援在雙引號內直接透過錢字號引用常/變數

JavaNoobPig

package DIP;

public class Person {

	public String name;

	public Person(String name) {
		this.name = name;
	}
}