Why can't I assign every element from user to arrayList in Kotlin?

Question

var length: Int = readLine()!!.toInt()
var actualLength: Int = length-1
var newArr = ArrayList<Int>(length)

var x: Int = 0
while(x<length-1){
print("Enter element at $x: ")
var temp: Int = readLine()!!.toInt()
newArr.set(x, temp)
x = x + 1
}
println()
for (element: Int in 0..actualLength){
println("Element at $element: "+newArr.get(element))
}

Answer 1

Your newArr doesn't get any elements by default so you must add them yourself. Your loop fails to read the last element. Updated your code to work.
https://code.sololearn.com/c0hOqPw6h9pF