Kotlin: Digit Sum

Question

Having trouble with one of the Kotlin lessons, it is having me write a code to find the sum of numbers. For example, find the sum of 123 for 6, however my code keeps returning the output of 0.

fun main(args: Array<String>) {
var num = readLine()!!.toInt()
var sum = 0
while (sum != 0) {
var i = num % 10
num = num / 10
sum = sum + i
}
println(sum)
}

Answer 1

Mike Duris

There should be

while (num != 0)

Answer 2

Mike Duris

Sun would never be 0 but num would be so there should be num != 0

Answer 3

In addition to the

(sum != 0)

Or opposed to?