count UPPER CASE letters and lower case letters in given word or sentense.

Write a program to input a String str from user and print count of uppercase and lowercase letters in it.

import java.lang.*;
import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner scn = new Scanner(System.in);
        // int n = scn.nextInt();
        String str = scn.nextLine();
        int n = str.length();
        int upper = 0; int lower = 0;
        for (int i =0; i < n; i++)
        {
            char ch = str.charAt(i);
            if (ch>='A' && ch <='Z')
            {
            upper++;
            }
            else if (ch >= 'a' && ch <='z')
            {
                lower++;
            }

        }
       System.out.println(upper);
       System.out.println(lower);

    }
}