Print Diamond Shape with Asterisks using Java Loop Pattern Program

Task: Print the Given Pattern

Objective: Use nested for loops to print the given pattern.

Print Diamond Shape with Asterisks using Java Loop Pattern Program

Pattern to Print:

    *
   * *
  *   *
 *     *
*       *
 *     *
  *   *
   * *
    *

Detailed Instructions:

• Use an outer for loop to iterate 9 times (representing the rows).
• Inside the outer loop, use an inner for loop to determine the number of spaces and asterisks (*).


• For the upper half (rows 0 to 4), print spaces followed by asterisks and spaces.
• For the lower half (rows 5 to 8), print spaces followed by asterisks and spaces in the reverse order.
• Print a newline character to move to the next row.

Sample Output:

    *
   * *
  *   *
 *     *
*       *
 *     *
  *   *
   * *
    *

Java Code:

public class PatternPrinter {
    public static void main(String[] args) {
        int n = 5; // Half the height of the pattern

        // Upper half
        for (int i = 0; i < n; i++) {
            for (int j = 0; j < n - i - 1; j++) {
                System.out.print(" ");
            }
            System.out.print("*");
            for (int j = 0; j < 2 * i - 1; j++) {
                System.out.print(" ");
            }
            if (i > 0) {
                System.out.print("*");
            }
            System.out.println();
        }

        // Lower half
        for (int i = n - 2; i >= 0; i--) {
            for (int j = 0; j < n - i - 1; j++) {
                System.out.print(" ");
            }
            System.out.print("*");
            for (int j = 0; j < 2 * i - 1; j++) {
                System.out.print(" ");
            }
            if (i > 0) {
                System.out.print("*");
            }
            System.out.println();
        }
    }
}