Posted on by Kalkicode
Code Pattern

Print L shape of given size

In this article, we will discuss a C program that prints an L shape of a given size using stars ('*') and spaces. The L shape consists of horizontal and vertical lines, forming the letter "L" on the screen. We will go through the problem statement, provide an explanation with a suitable example, present the algorithm and pseudocode, analyze the time complexity of the code, and explain the resultant output.

Problem Statement

The problem is to write a program that takes an integer size as input and prints an L shape using stars and spaces. The size represents the length and width of the L shape. The program should satisfy the following conditions:

  • The size must be greater than 2 and even because the L shape needs a minimum size of 3x3 to be recognizable.
  • The L shape should be formed using stars ('*') and spaces. Stars represent the outline of the L, while spaces fill the inner part of the L shape.
  • The L shape should be symmetric and aligned to the top-left corner of the output.

Explanation with Example

Let's understand the problem with an example. Suppose we have a size of 6. The output for this input will be:

  * * *
  * * *
  * * *
  * * * * * *
  * * * * * *
  * * * * * *
  

As we can see, the L shape is formed using stars and spaces. The stars create the outline of the L, while the spaces fill the inner part.

Algorithm and Pseudocode

To solve this problem, we can use nested loops to iterate over each position in the output and print either a star or a space based on the conditions defined. Here is the algorithm and pseudocode for the print_l_shape function:

function printLShape(size):
    if size <= 2 or size is odd:
        return

    for row from 0 to size-1:
        for col from 0 to size-1:
            if col is 0 or (col < size/2) or row is size-1 or (row >= size/2 and col >= size/2):
                print "* "
            else:
                print "  "
        print a new line

// Example usage:
printLShape(6)
printLShape(14)
printLShape(10)

Explanation of Algorithm

The algorithm starts by checking if the input size is less than or equal to 2 or odd. In such cases, the L shape cannot be formed, so the function returns. Then, two nested loops are used to iterate over each position in the output matrix. The outer loop controls the row operations, while the inner loop controls the column operations. For each position, the algorithm checks the conditions to determine whether to print a star or a space. The conditions ensure that the stars form the outline of the L shape, while the spaces fill the inner part. Finally, a newline character is printed to move to the next row.

Code Solution

Here given code implementation process.

//C Program 
//Print L shape of given size
#include <stdio.h>

//Print L shape star pattern of given size
void print_l_shape(int size)
{
	if (size <= 2 || size % 2 != 0)
	{
		return;
	}
	printf("\nsize : %d  \n\n", size);
	//Loop controlling variables
	int i = 0, j = 0;
	//Loop, which is control the printing row operations
	for (i = 0; i < size; ++i)
	{
		//Loop, which is control the printing column operations
		for (j = 0; j < size; ++j)
		{
			//Condition which is printing a star element
			if (j == 0 || (j < size / 2) || i == size - 1 || (i >= size / 2 && j >= size / 2))
			{
				printf("* ");
			}
			else
			{
				printf("  ");
			}
		}
		printf("\n");
	}
}
int main()
{
	//Simple test
	print_l_shape(6);
	print_l_shape(14);
	print_l_shape(10);
	return 0;
}

Output

size : 6

* * *
* * *
* * *
* * * * * *
* * * * * *
* * * * * *

size : 14

* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *

size : 10

* * * * *
* * * * *
* * * * *
* * * * *
* * * * *
* * * * * * * * * *
* * * * * * * * * *
* * * * * * * * * *
* * * * * * * * * *
* * * * * * * * * *
/*
Java program
Print L shape of given size
*/
class MyPattern
{
	//Print L shape star pattern of given size
	public void print_l_shape(int size)
	{
		if (size <= 2 || size % 2 != 0)
		{
			return;
		}
		System.out.print("\nsize : " + size + " \n\n");
		//Loop controlling variables
		int i = 0, j = 0;
		//Loop, which is control the printing row operations
		for (i = 0; i < size; ++i)
		{
			//Loop, which is control the printing column operations
			for (j = 0; j < size; ++j)
			{
				//Condition which is printing a star element
				if (j == 0 || (j < size / 2) || i == size - 1 || (i >= size / 2 && j >= size / 2))
				{
					System.out.print("* ");
				}
				else
				{
					System.out.print(" ");
				}
			}
			System.out.print("\n");
		}
	}
	public static void main(String[] args)
	{
		MyPattern obj = new MyPattern();
		//Simple test
		obj.print_l_shape(6);
		obj.print_l_shape(14);
		obj.print_l_shape(10);
	}
}

Output

size : 6

* * *
* * *
* * *
* * * * * *
* * * * * *
* * * * * *

size : 14

* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *

size : 10

* * * * *
* * * * *
* * * * *
* * * * *
* * * * *
* * * * * * * * * *
* * * * * * * * * *
* * * * * * * * * *
* * * * * * * * * *
* * * * * * * * * *
/*
C++ program
Print L shape of given size
*/
//Include header file
#include <iostream>

using namespace std;
class MyPattern
{
	public:
		//Print L shape star pattern of given size
		void print_l_shape(int size)
		{
			if (size <= 2 || size % 2 != 0)
			{
				return;
			}
			cout << "\nsize : " << size << " \n\n";
			//Loop controlling variables
			int i = 0, j = 0;
			//Loop, which is control the printing row operations
			for (i = 0; i < size; ++i)
			{
				//Loop, which is control the printing column operations
				for (j = 0; j < size; ++j)
				{
					//Condition which is printing a star element
					if (j == 0 || (j < size / 2) || i == size - 1 || (i >= size / 2 && j >= size / 2))
					{
						cout << "* ";
					}
					else
					{
						cout << " ";
					}
				}
				cout << "\n";
			}
		}
};
int main()
{
	MyPattern obj = MyPattern();
	//Simple test
	obj.print_l_shape(6);
	obj.print_l_shape(14);
	obj.print_l_shape(10);
	return 0;
}

Output

size : 6

* * *
* * *
* * *
* * * * * *
* * * * * *
* * * * * *

size : 14

* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *

size : 10

* * * * *
* * * * *
* * * * *
* * * * *
* * * * *
* * * * * * * * * *
* * * * * * * * * *
* * * * * * * * * *
* * * * * * * * * *
* * * * * * * * * *
/*
C# program
Print L shape of given size
*/
//Include namespace system
using System;
class MyPattern
{
	//Print L shape star pattern of given size
	public void print_l_shape(int size)
	{
		if (size <= 2 || size % 2 != 0)
		{
			return;
		}
		Console.Write("\nsize : " + size + " \n\n");
		//Loop controlling variables
		int i = 0, j = 0;
		//Loop, which is control the printing row operations
		for (i = 0; i < size; ++i)
		{
			//Loop, which is control the printing column operations
			for (j = 0; j < size; ++j)
			{
				//Condition which is printing a star element
				if (j == 0 || (j < size / 2) || i == size - 1 || (i >= size / 2 && j >= size / 2))
				{
					Console.Write("* ");
				}
				else
				{
					Console.Write(" ");
				}
			}
			Console.Write("\n");
		}
	}
	public static void Main(String[] args)
	{
		MyPattern obj = new MyPattern();
		//Simple test
		obj.print_l_shape(6);
		obj.print_l_shape(14);
		obj.print_l_shape(10);
	}
}

Output

size : 6

* * *
* * *
* * *
* * * * * *
* * * * * *
* * * * * *

size : 14

* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *

size : 10

* * * * *
* * * * *
* * * * *
* * * * *
* * * * *
* * * * * * * * * *
* * * * * * * * * *
* * * * * * * * * *
* * * * * * * * * *
* * * * * * * * * *
<?php
/*
Php program
Print L shape of given size
*/
class MyPattern
{
	//Print L shape star pattern of given size
	public	function print_l_shape($size)
	{
		if ($size <= 2 || $size % 2 != 0)
		{
			return;
		}
		echo "\nsize : ". $size ." \n\n";
		//Loop controlling variables
		$i = 0;
		$j = 0;
		//Loop, which is control the printing row operations
		for ($i = 0; $i < $size; ++$i)
		{
			//Loop, which is control the printing column operations
			for ($j = 0; $j < $size; ++$j)
			{
				//Condition which is printing a star element
				if ($j == 0 || ($j < intval($size / 2)) || $i == $size - 1 || ($i >= intval($size / 2) && $j >= intval($size / 2)))
				{
					echo "* ";
				}
				else
				{
					echo " ";
				}
			}
			echo "\n";
		}
	}
}

function main()
{
	$obj = new MyPattern();
	//Simple test
	$obj->print_l_shape(6);
	$obj->print_l_shape(14);
	$obj->print_l_shape(10);
}
main();

Output

size : 6

* * *
* * *
* * *
* * * * * *
* * * * * *
* * * * * *

size : 14

* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *

size : 10

* * * * *
* * * * *
* * * * *
* * * * *
* * * * *
* * * * * * * * * *
* * * * * * * * * *
* * * * * * * * * *
* * * * * * * * * *
* * * * * * * * * *
/*
Node Js program
Print L shape of given size
*/
class MyPattern
{
	//Print L shape star pattern of given size
	print_l_shape(size)
	{
		if (size <= 2 || size % 2 != 0)
		{
			return;
		}
		process.stdout.write("\nsize : " + size + " \n\n");
		//Loop controlling variables
		var i = 0;
		var j = 0;
		//Loop, which is control the printing row operations
		for (i = 0; i < size; ++i)
		{
			//Loop, which is control the printing column operations
			for (j = 0; j < size; ++j)
			{
				//Condition which is printing a star element
				if (j == 0 || (j < parseInt(size / 2)) || i == size - 1 || (i >= parseInt(size / 2) && j >= parseInt(size / 2)))
				{
					process.stdout.write("* ");
				}
				else
				{
					process.stdout.write(" ");
				}
			}
			process.stdout.write("\n");
		}
	}
}

function main()
{
	var obj = new MyPattern();
	//Simple test
	obj.print_l_shape(6);
	obj.print_l_shape(14);
	obj.print_l_shape(10);
}
main();

Output

size : 6

* * *
* * *
* * *
* * * * * *
* * * * * *
* * * * * *

size : 14

* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *

size : 10

* * * * *
* * * * *
* * * * *
* * * * *
* * * * *
* * * * * * * * * *
* * * * * * * * * *
* * * * * * * * * *
* * * * * * * * * *
* * * * * * * * * *
# Python 3 program
# Print L shape of given size

class MyPattern :
	# Print L shape star pattern of given size
	def print_l_shape(self, size) :
		if (size <= 2 or size % 2 != 0) :
			return
		
		print("\nsize : ", size ," \n\n", end = "")
		# Loop controlling variables
		i = 0
		j = 0
		# Loop, which is control the printing row operations
		while (i < size) :
			j = 0
			# Loop, which is control the printing column operations
			while (j < size) :
				# Condition which is printing a star element
				if (j == 0 or(j < int(size / 2)) or i == size - 1 or(i >= int(size / 2) and j >= int(size / 2))) :
					print("* ", end = "")
				else :
					print(" ", end = "")
				
				j += 1
			
			print("\n", end = "")
			i += 1
		
	

def main() :
	obj = MyPattern()
	# Simple test
	obj.print_l_shape(6)
	obj.print_l_shape(14)
	obj.print_l_shape(10)

if __name__ == "__main__": main()

Output

size :  6

* * *
* * *
* * *
* * * * * *
* * * * * *
* * * * * *

size :  14

* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *

size :  10

* * * * *
* * * * *
* * * * *
* * * * *
* * * * *
* * * * * * * * * *
* * * * * * * * * *
* * * * * * * * * *
* * * * * * * * * *
* * * * * * * * * *
# Ruby program
# Print L shape of given size

class MyPattern

	# Print L shape star pattern of given size
	def print_l_shape(size)
	
		if (size <= 2 || size % 2 != 0)
		
			return
		end
		print("\nsize : ", size ," \n\n")
		# Loop controlling variables
		i = 0
		j = 0
		# Loop, which is control the printing row operations
		while (i < size)
		
			j = 0
			# Loop, which is control the printing column operations
			while (j < size)
			
				# Condition which is printing a star element
				if (j == 0 || (j < size / 2) || i == size - 1 || (i >= size / 2 && j >= size / 2))
				
					print("* ")
				else
				
					print(" ")
				end
				j += 1
			end
			print("\n")
			i += 1
		end
	end
end
def main()

	obj = MyPattern.new()
	# Simple test
	obj.print_l_shape(6)
	obj.print_l_shape(14)
	obj.print_l_shape(10)
end
main()

Output

size : 6 

* * *    
* * *    
* * *    
* * * * * * 
* * * * * * 
* * * * * * 

size : 14 

* * * * * * *        
* * * * * * *        
* * * * * * *        
* * * * * * *        
* * * * * * *        
* * * * * * *        
* * * * * * *        
* * * * * * * * * * * * * * 
* * * * * * * * * * * * * * 
* * * * * * * * * * * * * * 
* * * * * * * * * * * * * * 
* * * * * * * * * * * * * * 
* * * * * * * * * * * * * * 
* * * * * * * * * * * * * * 

size : 10 

* * * * *      
* * * * *      
* * * * *      
* * * * *      
* * * * *      
* * * * * * * * * * 
* * * * * * * * * * 
* * * * * * * * * * 
* * * * * * * * * * 
* * * * * * * * * * 
/*
Scala program
Print L shape of given size
*/
class MyPattern
{
	//Print L shape star pattern of given size
	def print_l_shape(size: Int): Unit = {
		if (size <= 2 || size % 2 != 0)
		{
			return;
		}
		print("\nsize : " + size + " \n\n");
		//Loop controlling variables
		var i: Int = 0;
		var j: Int = 0;
		//Loop, which is control the printing row operations
		while (i < size)
		{
			j = 0;
			//Loop, which is control the printing column operations
			while (j < size)
			{
				//Condition which is printing a star element
				if (j == 0 || (j < (size / 2).toInt) || i == size - 1 || (i >= (size / 2).toInt && j >= (size / 2).toInt))
				{
					print("* ");
				}
				else
				{
					print(" ");
				}
				j += 1;
			}
			print("\n");
			i += 1;
		}
	}
}
object Main
{
	def main(args: Array[String]): Unit = {
		var obj: MyPattern = new MyPattern();
		//Simple test
		obj.print_l_shape(6);
		obj.print_l_shape(14);
		obj.print_l_shape(10);
	}
}

Output

size : 6

* * *
* * *
* * *
* * * * * *
* * * * * *
* * * * * *

size : 14

* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *

size : 10

* * * * *
* * * * *
* * * * *
* * * * *
* * * * *
* * * * * * * * * *
* * * * * * * * * *
* * * * * * * * * *
* * * * * * * * * *
* * * * * * * * * *
/*
Swift program
Print L shape of given size
*/
class MyPattern
{
	//Print L shape star pattern of given size
	func print_l_shape(_ size: Int)
	{
		if (size <= 2 || size % 2 != 0)
		{
			return;
		}
		print("\nsize : ", size ," \n\n", terminator: "");
		//Loop controlling variables
		var i: Int = 0;
		var j: Int = 0;
		//Loop, which is control the printing row operations
		while (i < size)
		{
			j = 0;
			//Loop, which is control the printing column operations
			while (j < size)
			{
				//Condition which is printing a star element
				if (j == 0 || (j < size / 2) || i == size - 1 || (i >= size / 2 && j >= size / 2))
				{
					print("* ", terminator: "");
				}
				else
				{
					print(" ", terminator: "");
				}
				j += 1;
			}
			print("\n", terminator: "");
			i += 1;
		}
	}
}
func main()
{
	let obj: MyPattern = MyPattern();
	//Simple test
	obj.print_l_shape(6);
	obj.print_l_shape(14);
	obj.print_l_shape(10);
}
main();

Output

size :  6

* * *
* * *
* * *
* * * * * *
* * * * * *
* * * * * *

size :  14

* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *

size :  10

* * * * *
* * * * *
* * * * *
* * * * *
* * * * *
* * * * * * * * * *
* * * * * * * * * *
* * * * * * * * * *
* * * * * * * * * *
* * * * * * * * * *

Time Complexity of the Code

The time complexity of the code is O(size^2) because it uses two nested loops that iterate over the size of the input. As the input size increases, the number of iterations grows quadratically.

Comment

Please share your knowledge to improve code and content standard. Also submit your doubts, and test case. We improve by your feedback. We will try to resolve your query as soon as possible.

New Comment