Using the switch-case statement, write a menu driven program to do the following:

Java Programming Language (Article) (Program)

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Using the switch-case statement, write a menu driven program to do the following:

(a) To generate and print Letters from A to Z and their Unicode

Letters	Unicode
A	65
B	66
.	.
.	.
.	.
Z	90

(b) Display the following pattern using iteration (looping) statement:

1
1 2
1 2 3
1 2 3 4
1 2 3 4 5

Program:

import java.util.Scanner;

public class RAnsariSwitchCase
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.println("Enter 1 for letters and Unicode");
        System.out.println("Enter 2 to display the pattern");
        System.out.print("Enter your choice: ");
        int ch = in.nextInt();
        switch(ch) {
            case 1:
            System.out.println("Letters\tUnicode");
            for (int i = 65; i <= 90; i++)
                System.out.println((char)i + "\t" + i);
            break;

            case 2:
            for (int i = 1; i <= 5; i++) {
                for (int j = 1; j <= i; j++)
                    System.out.print(j + " ");
                System.out.println();
            }
            break;

            default:
            System.out.println("Wrong choice");
            break;
        }
    }
}

Output:

Enter 1 for letters and Unicode
Enter 2 to display the pattern
Enter your choice: 1
Letters Unicode
A       65
B       66
C       67
D       68
E       69
F       70
G       71
H       72
I       73
J       74
K       75
L       76
M       77
N       78
O       79
P       80
Q       81
R       82
S       83
T       84
U       85
V       86
W       87
X       88
Y       89
Z       90
Press any key to continue . . .

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