Write a menu driven program to generate the upper case letters from Z to A and lower case letters from 'a' to 'z' as per the user's choice.
Enter '1' to display upper case letters from Z to A and Enter '2' to display lower case letters from a to z.

import java.util.Scanner;

public class KboatLetters
{
    public static void main(String args[]) {
        
        Scanner in = new Scanner(System.in);
        System.out.println("Enter '1' to display upper case letters from Z to A");
        System.out.println("Enter '2' to display lower case letters from a to z");
        
        System.out.print("Enter your choice: ");
        int ch = in.nextInt();
        int count = 0;
        
        switch (ch) {
            
            case 1:
            for (int i = 90; i > 64; i--) {
                char c = (char)i;
                System.out.print(c);
                System.out.print(" ");
                count++;
                
                //Print 10 characters per line 
                if (count == 10) {
                    System.out.println();
                    count = 0;
                }
            }  
            break;
            
            case 2:
            for (int i = 97; i < 123; i++) {
                char c = (char)i;
                System.out.print(c);
                System.out.print(" ");
                count++;
                
                //Print 10 characters per line 
                if (count == 10) {
                    System.out.println();
                    count = 0;
                }
            }
            break;
            
            default:
            System.out.println("Incorrect Choice");
        }
    }
}