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();
        if(num<=0)
        {
            System.out.print(num);
            System.exit(0);
        }
        int count=0;
        while(num!=0)
        {
            count++;
            num=num/10;
        }
        System.out.print(count);
    }
}