Java Program to Print Mirrored Rhombus Star Pattern

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Program to Print Mirrored Rhombus Star Pattern

In this article we are going to see how to print mirrored rhombus star program.

Example-1

When row value=4
****
  ****
    ****
      ****
Example-2:

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

Now, let’s see program to  how print it.

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Approach:

  • Enter total row and store it in an integer variable row.
  • Take first outer for loop to print all rows.
  • Take  first inner for loop to print column values i.e., first inner for loop will print all the spaces  in the column.
  • Take second  inner for loop to print column values i.e., second inner for loop will print all the stars in the column.

JAVA Code:

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();
    //printing row value 
    for (r = 1; r <= row ; r++)
        {
            //printing spaces
            for (c = 1; c <= r-1; c++)
                System.out.print(" ");
            // Print star in decreasing order
            for (c = 1; c <= row ; c++)
                System.out.print("*");
            //taking to the new line 
            System.out.println();
        }
    }    
}

Output:

Enter Rows :5
*****
  *****
    *****
      *****
        *****

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 op;
    //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 : ");
    op = s.next().charAt(0);
    //printing row value 
    for (r = 1; r <= row ; r++)
        {
            //printing spaces
            for (c = 1; c <= r-1; c++)
                System.out.print(" ");
            // Print star in decreasing order
            for (c = 1; c <= row ; c++)
                System.out.print(op);
            //taking to the new line 
            System.out.println();
        }
    }    
    
}

Output:

Enter Rows : 5
Enter character : $
$$$$$
  $$$$$
    $$$$$
      $$$$$
        $$$$$

Explanation :

Iteration-1

r=1 (passes the first for loop condition) as it will iterate up to r<=row times.

First inner for loop will print the space 1 to r-1  time that means 0 times.

then 2nd inner for loop will print the “* ”   row time , that means 5 time .

So, star will be printed five time.

*****

Iteration-2

r=2 (passes the first for loop condition) as it will iterate up to r<=row times.

First inner for loop will print the space 1 to r-1  time that means 1 times.

then 2nd inner for loop will print the “* ”   row time , that means 5 time .

So, star will be printed five time.

   *****

Iteration-3

r=3 (passes the first for loop condition) as it will iterate up to r<=row times.

First inner for loop will print the space 1 to r-1  time that means 2 times.

then 2nd inner for loop will print the “* ”   row time , that means 5 time .

So, star will be printed five time.

       *****

Iteration-4

r=4 (passes the first for loop condition) as it will iterate up to r<=row times.

First inner for loop will print the space 1 to r-1  time that means 3 times.

then 2nd inner for loop will print the “* ”   row time , that means 5 time .

So, star will be printed five time.

           *****

Iteration-5

r=5 (passes the first for loop condition) as it will iterate up to r<=row times.

First inner for loop will print the space 1 to r-1  time that means 4 times.

then 2nd inner for loop will print the “* ”   row time , that means 5 time .

So, star will be printed five time.

             *****

Now when r=6, first for loop condition will fail so no other loops will be executed.

At last, we will see a pattern like this

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

C Code:

#include <stdio.h>
int main() {
   int r, row, c ,d;
   printf("Enter rows: ");
   scanf("%d", &row);
   for (r = 1; r <= row ; r++)
        {
            //printing spaces
            for (c = 1; c <= r-1; c++)
                printf(" ");
            // Print star in decreasing order
            for (c = 1; c <= row ; c++)
                printf("*");
            //taking to the new line 
           printf("\n");
        }
   return 0;
}


Output:

Enter Rows :5
*****
  *****
    *****
      *****
        *****

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++)
        {
            //printing spaces
            for (c = 1; c <= r-1; c++)
                cout<< " ";
            // Print star in decreasing order
            for (c = 1; c <= row ; c++)
               cout<<"*";
            //taking to the new line 
           cout<<"\n";
        }
    return 0;
}

Output:

Enter Rows :5
*****
  *****
    *****
      *****
        *****

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