LeetcodeDailySolutions/Add Digits at main · Goalline-byte/LeetcodeDailySolutions · GitHub

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class Solution {
    public int addDigits(int num) {

        while (num>=10) {
            int sum = 0;
            int n1 = num/10;

            sum +=  num%10;
            while (n1>=10) {
                sum+= n1%10;
                n1 = n1/10;
            }
            sum += n1;
            num = sum;


        }

        return num;


    }
}