package my.demo import kotln.text.* fun main() { println("hello world") } fun main(args: Array<String>) { println(args.contentToString()) } fun main() { //sampleStart print("hello") print("world!") //sampleEnd } fun main() { //sampleStart println("hello world!") println(100) //sampleEnd } //sampleStart fun sum(a: Int, b: Int):Int{ //返回值是Int return a + b } //sampleEnd