Programming Example
Write a menu driven program to display the pattern as per user’s choice.
Study this program carefully to understand the logic, output, and explanation in a structured way.
Write a menu driven program to display the pattern as per user’s choice.
Pattern 1
ABCDE
ABCD
ABC
AB
A
Pattern 2
B
LL
UUU
EEEE
For an incorrect option, an appropriate error message should be displayed.
import java.util.Scanner;
public class RansariMenuPattern
{
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 2");
System.out.print("Enter your choice: ");
int choice = in.nextInt();
switch (choice) {
case 1:
for (int i = 69; i >= 65; i--) {
for (int j = 65; j <= i; j++) {
System.out.print((char)j);
}
System.out.println();
}
break;
case 2:
String word = "BLUE";
int len = word.length();
for(int i = 0; i < len; i++) {
for(int j = 0; j <= i; j++) {
System.out.print(word.charAt(i));
}
System.out.println();
}
break;
default:
System.out.println("Incorrect choice");
break;
}
}
}Enter 1 for pattern 1
Enter 2 for Pattern 2
Enter your choice: 1
ABCDE
ABCD
ABC
AB
A
Press any key to continue . . .
Enter 1 for pattern 1
Enter 2 for Pattern 2
Enter your choice: 2
B
LL
UUU
EEEE
Press any key to continue . . .
First read the algorithm, then study the program code line by line. After that, compare the code with the output and finally go through the explanation. This approach helps learners understand both the logic and the implementation properly.
After understanding this example, try to rewrite the same program without looking at the code. Then change some values or logic and run it again. This helps improve confidence and keeps learners engaged on the page for longer.