Java Program to Print Hollow Square Inside a Square Character Pattern

Program to Print Hollow Square Inside a Square Character Pattern

In the previous article, we have discussed Java Program to Print Solid Square Inside a Square Character Pattern

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

Example:

When row value = 10

ABCDEFGHIJ
A                 J
A  CDEFGH J
A  C         H J
A  C         H J
A  C         H J
A  C         H J
A  CDEFGH J
A                 J
ABCDEFGHIJ

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

Approach:

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

Java Code to Print Hollow Square Inside a Square Character Pattern

import java.util.*;
public class Main 
{    
    public static void main(String args[])   
    {   
    // taking variable for loop iteration and row .
    int row,r,c;
    // Starting ASCII value taken 64 
    int asciiAlpha = 64;
    //creating object of Scanner class
    Scanner s = new Scanner(System.in);
    // entering the number of row
    System.out.print("Enter rows : ");
    row = s.nextInt();
    
    //outer for loop 
    //To iterate all the rows
   for (r = 1; r <= row ; r++) 
   {
        // Inner for loop
        // 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)) 
                 //printing character
                 System.out.print((char)(c + asciiAlpha)); 
             else
                 //printing space
                 System.out.print(" "); 
        }
         System.out.print("\n");
   }
  }
}
Output :

Enter rows : 10

ABCDEFGHIJ
A                 J
A  CDEFGH J
A  C         H J
A  C         H J
A  C         H J
A  C         H J
A  CDEFGH J
A                J
ABCDEFGHIJ

C Code to Print Hollow Square Inside a Square Character Pattern

#include <stdio.h>
int main() 
{
   int r, row, c;
   int asciiAlpha = 64;
   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("%c",(c + asciiAlpha)); 
             else
             printf(" "); 
        }
          printf("\n");
   }
   return 0;
}
Output :

Enter rows: 10

ABCDEFGHIJ
A                 J
A  CDEFGH J
A  C         H J
A  C         H J
A  C         H J
A  C         H J
A  CDEFGH J
A                 J
ABCDEFGHIJ

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

#include <iostream>
using namespace std;
int main()
{
   int row, r , c ;
   int asciiAlpha = 64;
   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 << (char)(c + asciiAlpha); 
             else
            cout << " "; 
        }
         cout << "\n";
   }
   return 0;
}
Output:

Enter  rows: 10

ABCDEFGHIJ
A                 J
A  CDEFGH J
A  C         H J
A  C         H J
A  C         H J
A  C         H J
A  CDEFGH J
A                 J
ABCDEFGHIJ

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