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Java Pattern Programs

Using the switch statement, write a menu driven program to print the following patterns based on user's choice:

Pattern 1:

11
12 22
13 23 33
14 24 34 44
15 25 35 45 55

Pattern 2:

1
0 1
1 0 1
0 1 0 1
1 0 1 0 1

Java

Java Nested for Loops

ICSE

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Answer

import java.util.Scanner;

public class KboatPattern
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.println("Enter 1 for Pattern 1");
        System.out.println("Enter 2 for Pattern 3");
        System.out.print("Enter your choice: ");
        int ch = in.nextInt();
        switch(ch) {
            case 1:
            for (int i = 11, j = 1; j <= 5; i++, j++) {
                int t = i;
                for (int k = 1; k <= j; k++) {
                    System.out.print(t + " ");
                    t += 10;
                }
                System.out.println();
            }
            break;

            case 2:
            for (int i = 1; i <= 5; i++) {
                int t;
                if (i % 2 == 0)
                    t = 0;
                else
                    t = 1;
                for (int j = 1; j <= i; j++) {
                    System.out.print(t + " ");
                    if (t == 1)
                        t = 0;
                    else
                        t = 1;
                }
                System.out.println();
            }
            break;

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

Output

BlueJ output of Using the switch statement, write a menu driven program to print the following patterns based on user's choice: Pattern 1: 11 12 22 13 23 33 14 24 34 44 15 25 35 45 55 Pattern 2: 1 0 1 1 0 1 0 1 0 1 1 0 1 0 1BlueJ output of Using the switch statement, write a menu driven program to print the following patterns based on user's choice: Pattern 1: 11 12 22 13 23 33 14 24 34 44 15 25 35 45 55 Pattern 2: 1 0 1 1 0 1 0 1 0 1 1 0 1 0 1

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