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(); int i=0; if(num<=0) System.out.print(num); else { do{ num=num/10; i++; }while(num>0); System.out.print(i); } } }