Question

Using the switch statement, write a menu driven program for the following:

(i) To print the Floyd’s triangle [Given below]

1
2 3
4 5 6
7 8 9 10
11 12 13 14 15

(ii) To display the following pattern

I
I C
I C S
I C S E

For an incorrect option, an appropriate error message should be displayed.

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Code

				
					import java.util.Scanner;

public class program5
{
    public static void main(String[] args)
    {
        int choice=0,i=0,j=0,n=0;
        Scanner sc = new Scanner(System.in);
        System.out.println("Press 1 for Floyd's triangle");
        System.out.println("Press 2 to print  ICSE Pattern");
        System.out.print("Enter your choice: ");
        choice = sc.nextInt();
        switch (choice) 
        {
            case 1:
                System.out.print("Enter number of lines: ");
                n = sc.nextInt();
                int number = 1;
                for (i = 1; i <= n; i++)
                {
	                for (j = 1; j <= i; j++)
	                {
		                System.out.print(number + " ");
		                number++;
	                }
	                System.out.println();
                }
                break;
            
            case 2:
                System.out.print("Enter a  word: ");
                String word = sc.next();
                for (i = 0; i < word.length(); i++) 
                {
	                for (j = 0; j <= i; j++)
	                {
		                System.out.print(word.charAt(j) + " ");
	                }
	                System.out.println();
                }
                break;

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