Program to print solid and hollow square patterns

For any given number n, print Hollow and solid Squares and Rhombus made with stars(*).
Examples:

Input : n = 4
Output : 

Solid Square:
****
****
****
****

Hollow Square:
****
*  *
*  *
****

1. Solid Square : Solid Square is easiest among all given patterns. To print Solid square with n rows, we should use two loops iterating n times both. Where the outer loop is used for numbers of rows and the inner loop is used for printing all stars in a particular row.

2. Hollow Square : Hollow Square requires a little bit improvisation. Here we should again use two loops, where 1st and last row must have all n-stars and remaining rows have stars only in 1st and last column.

C++

filter_none

edit
close

play_arrow

link
brightness_4
code

// C++ program to print 
// hollow and solid square patterns
  
#include <bits/stdc++.h>
using namespace std;
  
// Function for hollow square
void hollowSquare(int rows)
{
    int i, j;
    for (i=1; i<=rows; i++)
    {
        // Print stars for each solid rows
        if (i==1 || i==rows)
            for (j=1; j<=rows; j++)
                cout << "*";
  
        // stars for hollow rows
        else
            for (j=1; j<=rows; j++)
                if (j==1 || j==rows)
                    cout << "*";
                else
                    cout << " ";
  
        // Move to the next line/row
        cout << "\n";
    }
}
  
// Function for Solid square
void solidSquare(int rows)
{
    int i, j;
    for (i=1; i<=rows; i++)
    {
        // Print stars after spaces
        for (j=1; j<=rows; j++)
            cout << "*";
  
        // Move to the next line/row
        cout << "\n";
    }
  
}
  
// Utility program to print all patterns
void printPattern(int rows)
{
    cout << "\nSolid Square:\n";
    solidSquare(rows);
      
    cout << "\nHollow Square:\n"
    hollowSquare(rows);
}
  
// Driver program
int main()
{
    int rows = 5;
    printPattern (rows);
    return 0;
}

chevron_right


Java

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java program to print 
// hollow and solid square patterns
  
class GFG 
{
    // Function for hollow square
    static void hollowSquare(int rows)
    {
        int i, j;
        for (i = 1; i <= rows; i++)
        {
            // Print stars for each solid rows
            if (i == 1 || i == rows)
                for (j = 1; j <= rows; j++)
                    System.out.print("*");
      
            // stars for hollow rows
            else
                for (j = 1; j <= rows; j++)
                    if (j == 1 || j == rows)
                        System.out.print("*");
                    else
                        System.out.print(" ");
      
            // Move to the next line/row
            System.out.print("\n");
        }
    }
      
    // Function for Solid square
    static void solidSquare(int rows)
    {
        int i, j;
        for (i = 1; i <= rows; i++)
        {
            // Print stars after spaces
            for (j = 1; j <= rows; j++)
                System.out.print("*");
      
            // Move to the next line/row
            System.out.print("\n");
        }
      
    }
      
    // Utility program to print all patterns
    static void printPattern(int rows)
    {
        System.out.print("\nSolid Square:\n");
        solidSquare(rows);
          
        System.out.print("\nHollow Square:\n"); 
        hollowSquare(rows);
    }
      
    // Driver program 
    public static void main (String[] args) 
    {
        int rows = 5;
        printPattern (rows);
    }
}
  
// This code is contributed by Anant Agarwal.

chevron_right


Python3

# Python3 program to print
# hollow and solid square patterns

# Function for hollow square
def hollowSquare(rows):

for i in range(1, rows + 1):

# Prstars for each solid rows
if (i == 1 or i == rows):
for j in range(1, rows + 1):
print(“*”, end = “”)

# stars for hollow rows
else:
for j in range(1, rows + 1):
if (j == 1 or j == rows):
print(“*”, end = “”)
else:
print(end = ” “)

# Move to the next line/row
print()

# Function for Solid square
def solidSquare(rows):

for i in range(1, rows):

# Print stars after spaces
for j in range(1, rows + 1):
print(“*”, end = “”)

# Move to the next line/row
print()

# Utility program to prall patterns
def printPattern(rows):

print(“Solid Square:”)
solidSquare(rows)

print(“\nHollow Square:”)
hollowSquare(rows)

# Driver Code
rows = 5
printPattern (rows)

# This code is contributed by
# Mohit kumar 29

C#

filter_none

edit
close

play_arrow

link
brightness_4
code

// C# program to print 
// hollow and solid square patterns
using System;
  
class GFG 
{
    // Function for hollow square
    static void hollowSquare(int rows)
    {
        int i, j;
        for (i = 1; i <= rows; i++)
        {
            // Print stars for each solid rows
            if (i == 1 || i == rows)
                for (j = 1; j <= rows; j++)
                    Console.Write("*");
      
            // stars for hollow rows
            else
                for (j = 1; j <= rows; j++)
                    if (j == 1 || j == rows)
                        Console.Write("*");
                    else
                        Console.Write(" ");
      
            // Move to the next line/row
            Console.WriteLine();
        }
    }
      
    // Function for Solid square
    static void solidSquare(int rows)
    {
        int i, j;
        for (i = 1; i <= rows; i++)
        {
            // Print stars after spaces
            for (j = 1; j <= rows; j++)
                Console.Write("*");
      
            // Move to the next line/row
            Console.WriteLine();
        }
      
    }
      
    // Utility program to print all patterns
    static void printPattern(int rows)
    {
        Console.Write("\nSolid Square:\n");
        solidSquare(rows);
          
        Console.Write("\nHollow Square:\n"); 
        hollowSquare(rows);
    }
      
    // Driver program 
    public static void Main () 
    {
        int rows = 5;
        printPattern (rows);
    }
}
  
// This code is contributed by vt_m.

chevron_right


PHP

filter_none

edit
close

play_arrow

link
brightness_4
code

<?php
// php program to print hollow 
// and solid square patterns
  
// Function for hollow square
function hollowSquare($rows)
{
    for ($i = 1; $i <= $rows; $i++)
    {
          
        // Print stars for each solid rows
        if ($i == 1 || $i == $rows)
            for ($j = 1; $j <= $rows; $j++)
                echo "*";
  
        // stars for hollow rows
        else
            for ($j = 1; $j <= $rows; $j++)
                if ($j == 1 || $j == $rows)
                    echo "*";
                else
                    echo " ";
  
        // Move to the next line/row
        echo "\n";
    }
}
  
// Function for Solid square
function solidSquare($rows)
{
    for ($i = 1; $i <= $rows; $i++)
    {
        // Print stars after spaces
        for ($j = 1; $j <= $rows; $j++)
            echo "*";
  
        // Move to the next line/row
        echo "\n";
    }
  
}
  
// Utility program to
// print all patterns
function printPattern($rows)
{
    echo "\nSolid Square:\n";
    solidSquare($rows);
      
    echo "\nHollow Square:\n"
    hollowSquare($rows);
}
  
    // Driver code
    $rows = 5;
    printPattern ($rows);
  
// This code is contributed by mits 
?>

chevron_right


Output :

Solid Square:
*****
*****
*****
*****
*****

Hollow Square:
*****
*   *
*   *
*   *
*****

This article is contributed by Shivam Pradhan (anuj_charm). If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.



My Personal Notes arrow_drop_up