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++
// 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; } |
Java
// 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. |
Python3
# Python3 program to print # hollow and solid square patterns # Function for hollow square def hollowSquare(rows): for i in range ( 1 , rows + 1 ): # Print stars 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 print all 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#
// 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. |
PHP
<?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 ?> |
Javascript
<script> // JavaScript program to print // hollow and solid square patterns // Function for hollow square function hollowSquare(rows) { var 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++) document.write( "*" ); // stars for hollow rows else for (j = 1; j <= rows; j++) if (j == 1 || j == rows) document.write( "*" ); else document.write( " " ); // Move to the next line/row document.write( "<br>" ); } } // Function for Solid square function solidSquare(rows) { var i, j; for (i = 1; i <= rows; i++) { // Print stars after spaces for (j = 1; j <= rows; j++) document.write( "*" ); // Move to the next line/row document.write( "<br>" ); } } // Utility program to print all patterns function printPattern(rows) { document.write( "Solid Square:<br>" ); solidSquare(rows); document.write( "<br>Hollow Square:<br>" ); hollowSquare(rows); } // Driver program var rows = 5; printPattern(rows); </script> |
Output :
Solid Square: ***** ***** ***** ***** ***** Hollow Square: ***** * * * * * * *****
Time Complexity: O(n2), where n represents the given input.
Auxiliary Space: O(1), no extra space is required, so it is a constant.
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