题解 | 计算整数位数

import java.util.Scanner;

public class Main 
{
    public static void main(String[] args) 
    {
        Scanner scan = new Scanner(System.in);
        int num = scan.nextInt();
        scan.close();
        int counter = 0;
        if (num <= 0)
            System.out.println(num);
        else 
        {
            while (num % 10 != 0) 
            {
                num /= 10;
                counter++;
            }
            System.out.println(counter);
        }
    }
}