Program to print a rectangle pattern
Given height h and width w, print a rectangular pattern as shown in example below.
Examples:
Input : h = 4, w = 5
Output : @@@@@
@ @
@ @
@@@@@
Input : h = 7, w = 9
Output : @@@@@@@@
@ @
@ @
@ @
@ @
@ @
@@@@@@@@
The idea is to run two loops. One for number of rows to be printed and other for number of columns. Print a ‘@’ only when current row is first or last. OR 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 codeint 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 codeh = 4w = 5printRectangle(h, w) # This code is contributed by Nikita Tiwari. |
C#
// C# program to print a rectangular // patternusing System;class GFG { static void printRectangle(int h, int w) { for (int i = 0; i < h; i++) { Console.WriteLine(); 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) Console.Write("@"); else Console.Write(" "); } } } // Driver code public static void Main() { int h = 4, w = 5; printRectangle(h, w) ; }} /*This code is contributed by vt_m.*/ |
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 ?> |
Output:
@@@@@ @ @ @ @ @@@@@
The time complexity is O(n2).
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