Can not decide

Question

I have been trying to solve this problem for a very long time. I ask for help. You need to add the numbers in the range.
fun main(args: Array<String>){
val lit1 = readLine() !!.toInt()
val lit2 = readLine() !!.toInt()

for (x in lit1..lit2){
}
}

Answer 1

Regaliv Derif

sum = 0

for (x in li1..lit2) {
sum += x
}

println (sum)

Answer 2

I didn’t think to deduce println(sum) from the loop body