Method sumOfSquare

java/0202-happy-number.java:22–33

(int n)

    }

    public int sumOfSquare(int n) {
        int output = 0;

        while (n != 0) {
            int digit = n % 10;
            digit = digit * digit;
            output += digit;
            n = n / 10;
        }

        return output;
    }
}