4. Find number of digits in an Integer

import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("Enter the number :");
        int i = sc.nextInt();
        int sum = 0;
        while(i!=0){
            i/=10;
            sum +=1;
        }
        System.out.println(sum);
    }
}