Loops in Kotlin

// For loops
for (i in 1..5) {
    println(i)  // 1, 2, 3, 4, 5
}

for (i in 1 until 5) {
    println(i)  // 1, 2, 3, 4
}

for (i in 5 downTo 1) {
    println(i)  // 5, 4, 3, 2, 1
}

for (i in 1..10 step 2) {
    println(i)  // 1, 3, 5, 7, 9
}

// Iterating collections
val list = listOf("a", "b", "c")
for (item in list) {
    println(item)
}

for ((index, value) in list.withIndex()) {
    println("$index: $value")
}

// While loops
var x = 5
while (x > 0) {
    println(x--)
}

// Do-while
do {
    val y = readLine()
} while (y != "exit")