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(num);
            return;

        }
        for(int i=0;i<64;i++){
		  //能除n遍,就说明有n+1位整数
            num=num/10;
            if(num<1){
                System.out.println(i+1);
                return;

            }

        }
        

    }
}