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
(b) 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.
import java.util.Scanner;
public class RAnsariPattern
{
public static void main(String args[]) {
Scanner in = new Scanner(System.in);
System.out.println("Type 1 for Floyd's triangle");
System.out.println("Type 2 for an ICSE pattern");
System.out.print("Enter your choice: ");
int ch = in.nextInt();
switch (ch) {
case 1:
int a = 1;
for (int i = 1; i <= 5; i++) {
for (int j = 1; j <= i; j++) {
System.out.print(a++ + "\t");
}
System.out.println();
}
break;
case 2:
String s = "ICSE";
for (int i = 0; i < s.length(); i++) {
for (int j = 0; j <= i; j++) {
System.out.print(s.charAt(j) + " ");
}
System.out.println();
}
break;
default:
System.out.println("Incorrect Choice");
}
}
}
Type 1 for Floyd's triangle
Type 2 for an ICSE pattern
Enter your choice: 1
1
2 3
4 5 6
7 8 9 10
11 12 13 14 15
Press any key to continue . . .
Type 1 for Floyd's triangle
Type 2 for an ICSE pattern
Enter your choice: 2
I
I C
I C S
I C S E
Press any key to continue . . .
First understand the algorithm carefully. Then study the program line-by-line and compare it with the output. Finally, review the explanation section to strengthen your logic and programming understanding.
Rewrite the program without looking at the code. Modify values, conditions or logic and run it again. This helps improve confidence and strengthens coding skills much faster.