for loop in kotlin' code example

Example 1: kotlin for

for (i in 1..5) print(i) 			// "12345"
for (i in 5 downTo 1) print(i) 		// "54321"
for (i in 0 until 5) { 				// "01234"
     println(i)
}
for(i in 0 until list.size()){
    println(i)
}

Example 2: for loop kotlin

val array = arrayOf(1, 3, 9)
for (item in array) {
    //loops items
}
for (index in 0..array.size - 1) {
	//loops all indices
}
for (index in 0 untill array.size) {
    //loops all indices
}
for (index in array.indices) {
    //loops all indices (performs just as well as two examples above)
}