Print Mirror Upper Star Triangle Pattern in Java

In this article, we will understand how to print mirror upper star triangle pattern. The pattern is formed by using multiple for-loops and print statements.

Below is a demonstration of the same −

Input

Suppose our input is −

Enter the number of rows : 8

Output

The desired output would be −

The mirror upper star pattern :
********
 *******
  ******
   *****
    ****
     ***
      **
       *

Algorithm

Step 1 - START
Step 2 - Declare four integer values namely i, j, k and my_input
Step 3 - Read the required values from the user/ define the values
Step 4 - We iterate through two nested 'for' loops inside a ‘for’ loop to get space between the characters.
Step 5 - After iterating through the innermost loop, we iterate through another 'for' loop. This will help print the required character.
Step 6 - Now, print a newline to get the specific number of characters in the subsequent lines.
Step 7 - Display the result
Step 8 - Stop

Example 1

Here, the input is being entered by the user based on a prompt. You can try this example live in our coding ground tool .

import java.util.Scanner;
public class MirrorTriangle{
   public static void main(String args[]){
      int i, j, k, my_input;
      System.out.println("Required packages have been imported");
      Scanner my_scanner = new Scanner(System.in);
      System.out.println("A reader object has been defined ");
      System.out.print("Enter the number of rows : ");
      my_input = my_scanner.nextInt();
      System.out.println("The mirror upper star pattern: ");
      for (i= my_input; i>= 1; i--){
         for (j=my_input; j>i;j--){
            System.out.print(" ");
         }
         for (k=1;k<=i;k++){
            System.out.print("*");
         }
         System.out.println("");
      }
   }
}

Output

Required packages have been imported
A reader object has been defined
Enter the number of rows : 8
The mirror upper star pattern:
********
 *******
  ******
   *****
    ****
     ***
      **
       *

Example 2

Here, the integer has been previously defined, and its value is accessed and displayed on the console.

public class MirrorTriangle{
   public static void main(String args[]){
      int i, j, k, my_input;
      my_input = 8;
      System.out.println("The number of rows is defined as " +my_input);
      System.out.println("The mirror upper star pattern: ");
      for (i= my_input; i>= 1; i--){
         for (j=my_input; j>i;j--){
            System.out.print(" ");
         }
         for (k=1;k<=i;k++){
            System.out.print("*");
         }
         System.out.println("");
      }
   }
}

Output

The number of rows is defined as 8
The mirror upper star pattern:
********
 *******
  ******
   *****
    ****
     ***
      **
       *