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Java program to print mirrored half diamond star pattern program. We have written below the print/draw mirrored half diamond asterisk/star pattern program in four different ways with sample example and output, check it out. At the end of the program, we added compiler so that you can execute the below codes.
- Print Mirrored Half Diamond Star Pattern – Using For Loop
- Print – Using While Loop
- print – Using Do While Loop
Using For Loop
1) For loop, execute the group of statements n number of times.
2) The 1st outer for loop iterates until the condition i<=n is false, the first inner loop display space until the condition j<=n-i is false,
3) 2nd inner loop will display the character until the condition j<i is false. The 1st outer loop will display this pattern after all iterations.
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1 2 3 4 5 |
* ** *** **** ***** |
4) The 2nd outer loop iterates until the condition i>0 is false, the first inner loop will display space until j<=n-i is false. The 2nd inner loop will display character until the condition j<=i is false. The 2nd outer loop will display this pattern.
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1 2 3 4 |
**** *** ** * |
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 |
import java.util.Scanner; public class MHalfdiamond { public static void main(String[] args) { Scanner sc=new Scanner(System.in); System.out.println("Enter N : "); int n=sc.nextInt(); System.out.print("Enter Symbol : "); char c = sc.next().charAt(0); for(int i=1;i<=n;i++) { for(int j=1;j<=n-i;j++) { System.out.print(" "); } for(int j=1;j<=i;j++) { System.out.print(c); } System.out.println(); } for(int i=n-1;i>0;i--) { for(int j=1;j<=n-i;j++) { System.out.print(" "); } for(int j=1;j<=i;j++) { System.out.print(c); } System.out.println(); } } } |
Output:
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Enter N : 5 Enter Symbol : * * ** *** **** ***** **** *** ** * |
Using While Loop
1) 1st outer while loop will execute the code until the condition i<=n is false. The 1st inner loop will display the space until the condition j++<=n-i is false, the 2nd inner loop will display the character until the condition j++<=i is false. The 1st outer loop will display the first half of the pattern of mirrored half diamond star pattern.
After first outer loop execution, the cursor comes to next line and executes the 2nd outer while loop.
2) 2nd outer loop will execute the statements until the condition i>0 is false, the 1st inner loop displays the space until the condition j++<=n-i is false, the 2nd inner loop will display character until the condition j++<=i is false. The 2nd outer loop will display the remaining half of the pattern of a mirrored half diamond.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 |
import java.util.Scanner; public class MHalfdiamond { public static void main(String[] args) { Scanner sc=new Scanner(System.in); System.out.println("Enter N : "); int n=sc.nextInt(); System.out.print("Enter Symbol : "); char c = sc.next().charAt(0); int i=1; int j; while(i<=n) { j=1; while(j++<=n-i) { System.out.print(" "); } j=1; while(j++<=i) { System.out.print(c); } System.out.println(); i++; } i=n-1; while(i>0) { j=1; while(j++<=n-i) { System.out.print(" "); } j=1; while(j++<=i) { System.out.print(c); } System.out.println(); i--; } } } |
Output:
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 |
Enter N : 10 Enter Symbol : - - -- --- ---- ----- ------ ------- -------- --------- ---------- --------- -------- ------- ------ ----- ---- --- -- - |
Using Do-While Loop
1) The do-while loop executes the code one time then checks the condition at while.
2) The 1st outer do-while loop executes the code until the condition is false ++i<=n is false, 1st inner loop will display the space until the condition ++j<=n-i+1 is false, 2nd inner loop will display character until the condition ++j<=i is false. This outer loop displays half of the pattern of a mirrored half diamond pattern.
3) The 2nd outer do-while loop executes the code until the condition–i>0 is false, 1st inner loop will display space until the condition ++j<=n-i+1, 2nd inner loop will display character until the condition ++j<=i is false. This outer loop displays the remaining half of the pattern of a mirrored half diamond pattern.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 |
import java.util.Scanner; public class MHalfdiamond { public static void main(String[] args) { Scanner sc=new Scanner(System.in); System.out.println("Enter N : "); int n=sc.nextInt(); System.out.print("Enter Symbol : "); char c = sc.next().charAt(0); int i=1; int j; do { j=1; do { System.out.print(" "); }while(++j<=n-i+1); j=1; do { System.out.print(c); }while(++j<=i); System.out.println(); } while(++i<=n); i=n-1; do { j=1; do { System.out.print(" "); }while(++j<=n-i+1); j=1; do { System.out.print(c); }while(++j<=i); System.out.println(); } while(--i>0); } } |
Output:
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Enter N : 5 Enter Symbol : , , ,, ,,, ,,,, ,,,,, ,,,, ,,, ,, , |
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