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();

        //write code here......
        if (num < 0) {
            System.out.println(-1);
        }
        if (num == 0) {
            System.out.println(num);
        }
        int count = 0;
        while (num != 0) {
            count++;
            num /= 10;
        }

        System.out.println(count);


    }
}