Java Program to Print Hollow Square Inside a Square Number Pattern

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Print Hollow Square Inside a Square Number Pattern

In the previous article, we have discussed Java Program to Print Hexagonal Number Pattern

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

When number of rows:8
11111111
2            2
3  3333  3
4  4    4  4
5  5    5  5
6  6666  6
7            7
88888888

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

Provided list of Simple Java Programs is specially designed for freshers and beginners to get familiarize with the concepts of Java programming language and become pro in coding.

Approach:

  • Enter total row and store it in an integer variable row.
  • Take first for loop to print the row value and number for each row.
  • Take first inner for loop to print the column value i.e., numbers 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 numbers according to loop.

Java Code to Print Hollow Square Inside a Square Number Pattern

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(r); 
             else
            System.out.print(" "); 
        }
         System.out.print("\n");
   }
  }
}
Output:

Enter rows : 8

11111111
2            2
3  3333  3
4  4     4 4
5  5     5 5
6  6666  6
7            7
88888888

C Code to Print Hollow Square Inside a Square Number Pattern

#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("%d",r); 
             else
             printf(" "); 
        }
          printf("\n");
   }
   return 0;
}
Output:

Enter rows : 
11111111
2            2
3  3333  3
4  4    4  4
5  5    5  5
6  6666  6
7            7
88888888

C++ Code to Print Hollow Square Inside a Square Number Pattern

#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 << r; 
             else
            cout << " "; 
        }
         cout << "\n";
   }
   return 0;
}
Output:

Enter rows : 8

11111111
2            2
3  3333  3
4  4    4  4
5  5    5  5
6  6666  6
7            7
88888888

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