Has someone solved the continuous input challenge from lesson?

Question

I got okay result, from case one e two, but three and four are hidden the correct outputs and I dunno what I did wrong:

fun main(args: Array<String>) {
var bb = 0
var aa = 0
while(true) {
var input = readLine()!!.toInt()

if (input == 0){

break
}

bb = input

}

if(bb>9){
aa = bb%10
} else if (bb < -9){
aa = bb%10
} else{
aa = bb
}

println(aa)
}

Answer 1

https://www.sololearn.com/Discuss/2719241/?ref=app

Answer 2

I can't find this Kotlin challenge.
Can you post it's location or the details of the challenge

Answer 3

Thanks Simba

Answer 4

Hey Rik, thanks for the help. Really there's no need to the 'aa' variable, but still the case 3 and 4 didn't get correctly and unfortunately and I can see what's the expected output.

The code I found on the link shared here on this Q&A, it works. I'll try understand why it works and mine not afterwards.

fun main(args: Array<String>) {

var i= 0
while(true) {
var input = readLine()!!.toInt()

i++

if(input==0) break

}
println(i-1)
}

Answer 5

João Batista dos Santos Sousa
I was getting an error stating that variable aa was redundant.

try this tweak

fun main(args: Array<String>) {
var bb = 0;
//var aa = 0;
while(true) {
var input = readLine()!!.toInt()

if (input == 0){
break
}
bb = input
}

if(bb>9){
bb = bb%10
} else if (bb < -9){
bb = bb%10
}

println(bb)
}