break, continue와 레이블이 지정된 반환

fun main() {
    for (i in 1..10) {
        if (i == 5) break
        print("$i ")
    }
    println() // 1 2 3 4
}

fun main() {
    for (i in 1..10) {
        if (i % 2 == 0) continue
        print("$i ")
    }
    println() // 1 3 5 7 9
}

fun main() {
    outer@ for (i in 1..3) {
        for (j in 1..3) {
            if (i == 2 && j == 2) break@outer
            println("$i,$j")
        }
    }
}

fun main() {
    outer@ for (i in 1..3) {
        for (j in 1..3) {
            if (j == 2) continue@outer
            println("i=$i j=$j")
        }
    }
}

fun main() {
    listOf(1, 2, 3, 4, 5).forEach {
        if (it == 3) return@forEach
        println(it)
    }
    println("Done")
}

fun process() {
    listOf(1, 2, 3).forEach {
        if (it == 2) return // exits process()
        println(it)
    }
    println("never printed")
}
fun main() { process() }

fun main() {
    listOf(1, 2, 3, 4).forEach loop@{
        if (it == 3) return@loop
        println(it)
    }
}

fun main() {
    var i = 0
    while (true) {
        if (i >= 3) break
        println("i = $i")
        i++
    }
}

fun main() {
    val grid = listOf(listOf(1,2,0), listOf(3,4,5), listOf(0,6,7))
    rows@ for (row in grid) {
        for (cell in row) {
            if (cell == 0) continue@rows
            print("$cell ")
        }
        println()
    }
}

fun firstMatch(grid: List<List<Int>>, target: Int): Pair<Int,Int>? {
    for (r in grid.indices) for (c in grid[r].indices) {
        if (grid[r][c] == target) return r to c
    }
    return null
}
fun main() {
    val g = listOf(listOf(1,2),listOf(3,4))
    println(firstMatch(g, 3))
}