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Program to print a rectangle pattern

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  • Difficulty Level : Medium
  • Last Updated : 13 Jan, 2023
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Given height h and width w, print a rectangular pattern as shown in the example below.

Examples:

Input  : h = 4, w = 5
Output : @@@@@
         @   @
         @   @
         @@@@@

Input  : h = 7, w = 9
Output : @@@@@@@@
         @      @
         @      @
         @      @
         @      @
         @      @
         @@@@@@@@

The idea is to run two loops. One for the number of rows to be printed and the other for the number of columns. Print a ‘@’ only when the current row is first or last. OR the current column is first or last. 

C++




// CPP program to print a rectangular pattern
#include<iostream>
using namespace std;
 
void printRectangle(int h, int w)
{
    for (int i=0; i<h; i++)
    {
        cout << "\n";
        for (int j=0; j<w; j++)
        {
            // Print @ if this is first row
            // or last row. Or this column
            // is first or last.
            if (i == 0 || i == h-1 ||
                j== 0 || j == w-1)
               cout << "@";
            else
               cout << " ";
        }
    }
}
 
// Driver code
int main()
    int h = 4, w = 5;
    printRectangle(h, w);
    return 0;
}

Java




// JAVA program to print a rectangular
// pattern
 
class GFG {
     
    static void printRectangle(int h, int w)
    {
        for (int i = 0; i < h; i++)
        {
            System.out.println();
            for (int j = 0; j < w; j++)
            {
                // Print @ if this is first
                // row or last row. Or this
                // column is first or last.
                if (i == 0 || i == h-1 ||
                    j== 0 || j == w-1)
                   System.out.print("@");
                else
                   System.out.print(" ");
            }
        }
    }
      
    // Driver code
    public static void main(String args[])
    
        int h = 4, w = 5;
        printRectangle(h, w) ;
    }
}
 
/*This code is contributed by Nikita Tiwari.*/

Python3




# Python 3 program to print a rectangular
# pattern
 
def printRectangle(h, w) :
    for i in range(0, h) :
        print ("")
        for j in range(0, w) :
            # Print @ if this is first row
            # or last row. Or this column
            # is first or last.
            if (i == 0 or i == h-1 or j== 0 or j == w-1) :
                print("@",end="")
            else :
                print(" ",end="")
         
  
# Driver code
h = 4
w = 5
printRectangle(h, w)
 
# This code is contributed by Nikita Tiwari.

PHP




<?php
// php program to print
// a rectangular pattern
 
function printRectangle($h , $w)
{
    for ($i = 0; $i < $h; $i++)
    {
        echo"\n";
        for ($j = 0; $j < $w; $j++)
        {
             
            // Print @ if this is first row
            // or last row. Or this column
            // is first or last.
            if ($i == 0 || $i == $h - 1 ||
                $j == 0 || $j == $w - 1)
            echo"@";
            else
            echo" ";
        }
    }
}
 
    // Driver code
    $h = 4;
    $w = 5;
    printRectangle($h, $w);
 
// This code is contributed by mits
?>

Javascript




// Javascript program to print a rectangular pattern
 
function printRectangle(h, w)
{
    for(var i=0; i<h; i++)
    {
        console.log("\n");
        for(var j=0; j<w; j++)
        {
            // Print @ if this is first row
            // or last row. Or this column
            // is first or last.
            if (i == 0 || i == h-1 ||
                j== 0 || j == w-1)
               console.log("@");
            else
               console.log(" ");
        }
    }
}
 
// Driver code
 
var h = 4, w = 5;
printRectangle(h, w);
<script>
 
// This code is contributed by Abhijeet Kumar(abhijeet19403)

Output

@@@@@
@   @
@   @
@@@@@

Time complexity: O(n2), Space Complexity: O(1) //  Constant space.

This article is contributed by Anurag Rawat. If you like GeeksforGeeks and would like to contribute, you can also write an article using write.geeksforgeeks.org or mail your article to review-team@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

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


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