LeetCode题目1 - Reverse Integer

Reverse digits of an integer.
Example1: x = 123, return 321
Example2: x = -123, return -321
Discuss: 1.If the integer‘s last digit is 0, what should the output be? ie, cases such as 10, 100.
 　　　　 2.Reversed integer overflow.

public static int ReverseInteger(int num)
        {
            bool is_neg = num < 0;
            int newNum = Math.Abs(num);
            int result = 0;

            while (newNum > 0)
            {
                result = result * 10 + (newNum % 10);
                newNum /= 10;
            }

            if (is_neg)
                result *= -1;

            return result;
        }