题解 | 计算整数位数

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int num = sc.nextInt();
        sc.close();
        int count = 1;
        //write code here......
        if(num<0){
            System.out.println(num);
        }else if(num>=0){
            while(num>10){
                num = num/10;
                count++;
            }
            System.out.println(count);
        }
        

    }
}

用一个循环查找num的位数