Java Program to Print Hollow Inverted Mirrored Right Angle Triangle Star Pattern

Program to Print Hollow Inverted Mirrored Right Angle Triangle Star Pattern

In this article we are going to see how to print Hollow inverted mirrored right angle tringle star program.

Example-1

When row value=4
****
 * *
  **
   *

Example-2:

When row value=5
*****
 *  *
  * *
   **
    *

Now, let’s see the actual program printing it.

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Approach:

Enter total row and store it in an integer variable row.
Take first for loop to print upper hollow part.
Take first inner for loop to print spaces in increasing order.
Take second inner for loop to print stars according to the condition
if(r == 1 || c == r|| c == row)
Then go on printing the star symbol according to loop.

JAVA Code:

Static Star Character
User Input Character

Method-1 : Static Star Character

import java.util.*;
public class Main 
{    
    public static void main(String args[])   
    {   
    // taking variable for loop iteration and row .
    int row,r,c,d;
    //creating object 
    Scanner s = new Scanner(System.in);
    // entering the number of row
    System.out.print("Enter rows : ");
    row = s.nextInt();
    //outer for loop 
    for (r=1; r<=row; r++)
        {
            // Print space in increasing order
            for (c=1; c<r; c++)
                System.out.print(" ");
            // Print star in decreasing order
            for (c=row; c>=r; c--)
            {
                if( r == 1 || c == r || c == row)
                    System.out.print("*");
                else
                    System.out.print(" ");
            }
            System.out.println();
        }
    }
}

Output :

Enter Rows :
*****
 *   *
  *  *
    **
     *

Method-2 : User Input Character

import java.util.*;
public class Main 
{    
    public static void main(String args[])   
    {   
    // taking variable for loop iteration and row .
    int row,r,c,d;
    char ch;
    //creating object 
    Scanner s = new Scanner(System.in);
    // entering the number of row
    System.out.print("Enter rows : ");
    row = s.nextInt();
    // entering any random character
    System.out.print("Enter character : ");
    ch = s.next().charAt(0);
    //outer for loop 
    for (r=1; r<=row; r++)
        {
            // Print space in increasing order
            for (c=1; c<r; c++)
                System.out.print(" ");
            // Print star in decreasing order
            for (c=row; c>=r; c--)
            {
                if( r == 1 || c == r || c == row)
                    System.out.print(ch);
                else
                    System.out.print(" ");
            }
            System.out.println();
        }
    }
}

Output :

Enter Rows : 5
Enter Character : a
aaaaa
  a   a
    a a
     aa
       a

C Code:

#include <stdio.h>
int main() {
   int r, row, c ,d;
   printf("Enter rows: ");
   scanf("%d", &row);
    for (r=1; r<=row; r++)
        {
            // Print space in increasing order
            for (c=1; c<r; c++)
                printf(" ");
            // Print star in decreasing order
            for (c=row; c>=r; c--)
            {
                if( r == 1 || c == r || c == row)
                    printf("*");
                else
                   printf(" ");
            }
            printf("\n");
        }
   return 0;
}

Output :

Enter Rows :
*****
 *   *
  *  *
    **
     *

C++ Code:

#include <iostream>
using namespace std;
int main()
{
   int row, r , c ,d ;
   cout << "Enter  rows: ";
   cin >> row;
     for (r=1; r<=row; r++)
        {
            // Print space in increasing order
            for (c=1; c<r; c++)
                cout << " ";
            // Print star in decreasing order
            for (c=row; c>=r; c--)
            {
                if( r == 1 || c == r || c == row)
                    cout << "*";
                else
                    cout << " ";
            }
            cout << "\n";
        }
   return 0;
}

Output :

Enter Rows :
*****
 *   *
  *  *
    **
     *

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