Diamond Pattern in Java: Explanation & Practice

Problem summary

Print a diamond pattern with given width (must be odd number).

Starter code

public class Main {
    public static void main(String[] args) {
        int width = 5; // Test case 1 (must be odd)
        
        // Print diamond pattern
    }
}

Expected output and test cases

• Width 5 diamond

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

• Width 3 diamond

   *
  ***
   *

• Width 7 diamond

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

Hints

1. First half is expanding pyramid
2. Second half is shrinking pyramid
3. Stars per row: 1, 3, 5... then 5, 3, 1

Related Control Flow exercises

• Practice Decimal to Binary in Java
• Practice Sum Until Condition in Java
• Practice Collatz Conjecture in Java

Practice all Control Flow exercises · Run this idea in the Java compiler