Loop

Question

I dont think the while loop works I have no way to check my answer
Is this correct the sum is supposed to equal 0

fun main(args: Array<String>) {
var num = readLine()!!.toInt()
while (num <= 426) {
num += 1
num /= 10
num %= 10
num /= 10
}
println(num)
}

Answer 1

I put a little comment in the snippet. Hope it explains things a bit

fun main(args: Array<String>)
{
var num: Int = readLine()!!.toInt()
var sum: Int = 0
while ( num != 0 )
{
sum += num % 10 // add last digit of <num> to <sum>
num /= 10 // remove last digit of <num> by dividing <num> by 10
}
println( sum )
}

Answer 2

What is this code supposed to do?

Answer 3

I see thanks

Answer 4

Finding the sum of the digits of a number is a popular coding challenge.
Given a number as input, calculate and output its digit sum.

Sample Input:
426

Sample Output:
12

Hint: Use a while loop to iterate over the number. During each iteration add the last digit to the sum by dividing the number by 10 and taking the remainder (num % 10), then remove the last digit of the number by dividing it by 10 (num / 10).