Java Program to Print Hollow Square Inside a Square Star Pattern

Program to Print Hollow Square Inside a Square Star Pattern

In this article we are going to see how to print Hollow Square Inside a square star program.

Example-1

When row value=10

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

Example-2:

When row value=7

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

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 the row value and a star for each row.
Take first inner for loop to print the column value i.e., stars according to the condition
if ((r == 1 || r == row || c == 1 || c == row) || (r >= 3 && r <= row - 2 && c >= 3 && c <= row - 2) && (r == 3 || r == row - 2 || c == 3 || c == row - 2)) else it will print spaces .
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;
    //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++) 
   {
      // To print  columns of the square
        for (c = 1; c <=row ; c++) 
        {
        // For printing the square pattern 
             if ((r == 1 || r == row  || c == 1 || c == row) || (r >= 3 && r <= row - 2 && c >= 3 && c <= row-2) && (r == 3 || r == row - 2 || c == 3 || c == row - 2)) 
                 System.out.print("*"); 
             else
            System.out.print(" "); 
        }
         System.out.print("\n");
   }
  }
}

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;
    //creating object 
    Scanner s = new Scanner(System.in);
    // entering the number of row
    System.out.print("Enter rows : ");
    row = s.nextInt();
    // entering any character
    System.out.print("Enter character : ");
    char square = s.next().charAt(0);
    //outer for loop 
   for (r = 1; r <= row ; r++) 
   {
      // To print  columns of the square
        for (c = 1; c <=row ; c++) 
        {
        // For printing the square pattern 
             if ((r == 1 || r == row  || c == 1 || c == row) || (r >= 3 && r <= row - 2 && c >= 3 && c <= row-2) && (r == 3 || r == row - 2 || c == 3 || c == row - 2)) 
                 System.out.print(square); 
             else
            System.out.print(" "); 
        }
         System.out.print("\n");
   }
  }
}

Output :

Enter row :  7
Enter character : *

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

C Code:

#include <stdio.h>
int main() 
{
   int r, row, c;
   printf("Enter rows: ");
   scanf("%d", &row);
   for (r = 1; r <= row ; r++) 
   {
        for (c = 1; c <=row ; c++) 
        {
             if ((r == 1 || r == row  || c == 1 || c == row) || (r >= 3 && r <= row - 2 && c >= 3 && c <= row - 2)
 && (r == 3 || r == row - 2 || c == 3 || c == row - 2)) 
                  printf("*"); 
             else
             printf(" "); 
        }
          printf("\n");
   }
   return 0;
}

Output :

Enter row :  7

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

C++ Code:

#include <iostream>
using namespace std;
int main()
{
   int row, r , c ;
   cout << "Enter  rows: ";
   cin >> row;
   for (r = 1; r <= row ; r++) 
   {
        for (c = 1; c <=row ; c++) 
        {
             if ((r == 1 || r == row  || c == 1 || c == row) || (r >= 3 && r <= row - 2 && c >= 3 && c <= row - 2) 
&& (r == 3 || r == row - 2 || c == 3 || c == row - 2)) 
                 cout << "*"; 
             else
            cout << " "; 
        }
         cout << "\n";
   }
   return 0;
}

Output :

Enter row :  7

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

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