[TOC] # 区间定义 ~~~ /*---------------------------- 定义1到100 ----------------------------*/ val range1 = 1..100 1 until 100 //[1,100) val range2 = IntRange(1,100) val range3 = 1.rangeTo(100) /*---------------------------- 长整形区间 ----------------------------*/ val range4 = 1L..100L val range5 = LongRange(1L,100L) val range6 = 1L.rangeTo(100L) /*---------------------------- 字符区间 ----------------------------*/ val range7 = 'a'..'z' val range8 = CharRange('a','z') val range9 = 'a'.rangeTo('z') ~~~ # 区间遍历 ~~~ val range = 1..100 /*---------------------------- for ----------------------------*/ // for (i in range) { // println(i) // } // for ((index,i) in range.withIndex()) { // println("index=$index i=$i") // } /*---------------------------- foreach ----------------------------*/ // range.forEach { // println(it) // } range.forEachIndexed { index, i -> println("index=$index i=$i") } ~~~ # 反向区间和区间反转 ~~~ /*---------------------------- 反向区间 ----------------------------*/ //定义100到1的区间 val range = 100 downTo 1 // range.forEach { // println(it) // } /*---------------------------- 区间反转 ----------------------------*/ val range1 = 1..100 val range2 = range1.reversed() // range2.forEach { // println(it) // } for (i in range2 step 5) { println(i) } ~~~