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)//如果num<=0，则直接输出这个数
            System.out.println(num);
        else//否则对这个数的位数进行计数
        {
            int count=0;
            while(num!=0)
            {
                count++;
                num/=10;
            }
            System.out.println(count);
        }

    }
}