Find nearest power of 2 less than or equal to a number

Here given code implementation process.

// C program 
// Find nearest power of 2 less than or equal to a number
#include <stdio.h>

// Find nearest power of given number
void nearestPower2(int num)
{
	int n = num;
	// First set all bits
	n = n | n >> 1;
	n = n | n >> 2;
	n = n | n >> 4;
	n = n | n >> 8;
	n = n | n >> 16;
	// Get final result
	// n are indicates all active bits of given a number
	// So shift n one by left and perform xor operation
	n = n ^ (n >> 1);
	// Display calculated result
	printf("\n Number :  %d", num);
	printf("\n Power  :  %d\n", n);
}
int main(int argc, char
	const *argv[])
{
	// Test Cases
	nearestPower2(10);
	nearestPower2(31);
	nearestPower2(64);
	nearestPower2(43);
	return 0;
}

Output

 Number :  10
 Power  :  8

 Number :  31
 Power  :  16

 Number :  64
 Power  :  64

 Number :  43
 Power  :  32
/*
  Java program
  Find nearest power of 2 less than or equal to a number
*/
public class Power
{
   
    // Find nearest power of given number
    public void nearestPower2(int num)
    {
        int n = num;
        // First set all bits
        n = n | n >> 1;
        n = n | n >> 2;
        n = n | n >> 4;
        n = n | n >> 8;
        n = n | n >> 16;
        // Get final result
        // n are indicates all active bits of given a number
        // So shift n one by left and perform xor operation
        n = n ^ (n >> 1);
        // Display calculated result
        System.out.print("\n Number : " + num );
        System.out.print("\n Power : " + n + "\n");
    }

    public static void main(String[] args)
    {
        Power task = new Power();
        // Test Cases
        task.nearestPower2(10);
        task.nearestPower2(31);
        task.nearestPower2(64);
        task.nearestPower2(43);
    }
}

Output

 Number : 10
 Power : 8

 Number : 31
 Power : 16

 Number : 64
 Power : 64

 Number : 43
 Power : 32
// Include header file
#include <iostream>
using namespace std;

/*
  C++ program
  Find nearest power of 2 less than or equal to a number
*/

class Power
{
	public:
		// Find nearest power of given number
		void nearestPower2(int num)
		{
			int n = num;
			// First set all bits
			n = n | n >> 1;
			n = n | n >> 2;
			n = n | n >> 4;
			n = n | n >> 8;
			n = n | n >> 16;
			// Get final result
			// n are indicates all active bits of given a number
			// So shift n one by left and perform xor operation
			n = n ^ (n >> 1);
			// Display calculated result
			cout << "\n Number : " << num;
			cout << "\n Power : " << n << "\n";
		}
};
int main()
{
	Power task = Power();
	// Test Cases
	task.nearestPower2(10);
	task.nearestPower2(31);
	task.nearestPower2(64);
	task.nearestPower2(43);
	return 0;
}

Output

 Number : 10
 Power : 8

 Number : 31
 Power : 16

 Number : 64
 Power : 64

 Number : 43
 Power : 32
// Include namespace system
using System;
/*
  C# program
  Find nearest power of 2 less than or equal to a number
*/
public class Power
{
	// Find nearest power of given number
	public void nearestPower2(int num)
	{
		int n = num;
		// First set all bits
		n = n | n >> 1;
		n = n | n >> 2;
		n = n | n >> 4;
		n = n | n >> 8;
		n = n | n >> 16;
		// Get final result
		// n are indicates all active bits of given a number
		// So shift n one by left and perform xor operation
		n = n ^ (n >> 1);
		// Display calculated result
		Console.Write("\n Number : " + num);
		Console.Write("\n Power : " + n + "\n");
	}
	public static void Main(String[] args)
	{
		Power task = new Power();
		// Test Cases
		task.nearestPower2(10);
		task.nearestPower2(31);
		task.nearestPower2(64);
		task.nearestPower2(43);
	}
}

Output

 Number : 10
 Power : 8

 Number : 31
 Power : 16

 Number : 64
 Power : 64

 Number : 43
 Power : 32
<?php
/*
  Php program
  Find nearest power of 2 less than or equal to a number
*/
class Power
{
	// Find nearest power of given number
	public	function nearestPower2($num)
	{
		$n = $num;
		// First set all bits
		$n = $n | $n >> 1;
		$n = $n | $n >> 2;
		$n = $n | $n >> 4;
		$n = $n | $n >> 8;
		$n = $n | $n >> 16;
		// Get final result
		// n are indicates all active bits of given a number
		// So shift n one by left and perform xor operation
		$n = $n ^ ($n >> 1);
		// Display calculated result
		echo "\n Number : ". $num;
		echo "\n Power : ". $n ."\n";
	}
}

function main()
{
	$task = new Power();
	// Test Cases
	$task->nearestPower2(10);
	$task->nearestPower2(31);
	$task->nearestPower2(64);
	$task->nearestPower2(43);
}
main();

Output

 Number : 10
 Power : 8

 Number : 31
 Power : 16

 Number : 64
 Power : 64

 Number : 43
 Power : 32
/*
  Node Js program
  Find nearest power of 2 less than or equal to a number
*/
class Power
{
	// Find nearest power of given number
	nearestPower2(num)
	{
		var n = num;
		// First set all bits
		n = n | n >> 1;
		n = n | n >> 2;
		n = n | n >> 4;
		n = n | n >> 8;
		n = n | n >> 16;
		// Get final result
		// n are indicates all active bits of given a number
		// So shift n one by left and perform xor operation
		n = n ^ (n >> 1);
		// Display calculated result
		process.stdout.write("\n Number : " + num);
		process.stdout.write("\n Power : " + n + "\n");
	}
}

function main()
{
	var task = new Power();
	// Test Cases
	task.nearestPower2(10);
	task.nearestPower2(31);
	task.nearestPower2(64);
	task.nearestPower2(43);
}
main();

Output

 Number : 10
 Power : 8

 Number : 31
 Power : 16

 Number : 64
 Power : 64

 Number : 43
 Power : 32
#   Python 3 program
#   Find nearest power of 2 less than or equal to a number

class Power :
	#  Find nearest power of given number
	def nearestPower2(self, num) :
		n = num
		#  First set all bits
		n = n | n >> 1
		n = n | n >> 2
		n = n | n >> 4
		n = n | n >> 8
		n = n | n >> 16
		#  Get final result
		#  n are indicates all active bits of given a number
		#  So shift n one by left and perform xor operation
		n = n ^ (n >> 1)
		#  Display calculated result
		print("\n Number : ", num, end = "")
		print("\n Power : ", n )
	

def main() :
	task = Power()
	#  Test Cases
	task.nearestPower2(10)
	task.nearestPower2(31)
	task.nearestPower2(64)
	task.nearestPower2(43)

if __name__ == "__main__": main()

Output

 Number :  10
 Power :  8

 Number :  31
 Power :  16

 Number :  64
 Power :  64

 Number :  43
 Power :  32
#   Ruby program
#   Find nearest power of 2 less than or equal to a number

class Power 
	#  Find nearest power of given number
	def nearestPower2(num) 
		n = num
		#  First set all bits
		n = n | n >> 1
		n = n | n >> 2
		n = n | n >> 4
		n = n | n >> 8
		n = n | n >> 16
		#  Get final result
		#  n are indicates all active bits of given a number
		#  So shift n one by left and perform xor operation
		n = n ^ (n >> 1)
		#  Display calculated result
		print("\n Number : ", num)
		print("\n Power : ", n ,"\n")
	end

end

def main() 
	task = Power.new()
	#  Test Cases
	task.nearestPower2(10)
	task.nearestPower2(31)
	task.nearestPower2(64)
	task.nearestPower2(43)
end

main()

Output

 Number : 10
 Power : 8

 Number : 31
 Power : 16

 Number : 64
 Power : 64

 Number : 43
 Power : 32

/*
  Scala program
  Find nearest power of 2 less than or equal to a number
*/
class Power
{
	// Find nearest power of given number
	def nearestPower2(num: Int): Unit = {
		var n: Int = num;
		// First set all bits
		n = n | n >> 1;
		n = n | n >> 2;
		n = n | n >> 4;
		n = n | n >> 8;
		n = n | n >> 16;
		// Get final result
		// n are indicates all active bits of given a number
		// So shift n one by left and perform xor operation
		n = n ^ (n >> 1);
		// Display calculated result
		print("\n Number : " + num);
		print("\n Power : " + n + "\n");
	}
}
object Main
{
	def main(args: Array[String]): Unit = {
		var task: Power = new Power();
		// Test Cases
		task.nearestPower2(10);
		task.nearestPower2(31);
		task.nearestPower2(64);
		task.nearestPower2(43);
	}
}

Output

 Number : 10
 Power : 8

 Number : 31
 Power : 16

 Number : 64
 Power : 64

 Number : 43
 Power : 32
/*
  Swift 4 program
  Find nearest power of 2 less than or equal to a number
*/
class Power
{
	// Find nearest power of given number
	func nearestPower2(_ num: Int)
	{
		var n: Int = num;
		// First set all bits
		n = n | n >> 1;
		n = n | n >> 2;
		n = n | n >> 4;
		n = n | n >> 8;
		n = n | n >> 16;
		// Get final result
		// n are indicates all active bits of given a number
		// So shift n one by left and perform xor operation
		n = n ^ (n >> 1);
		// Display calculated result
		print("\n Number : ", num, terminator: "");
		print("\n Power : ", n );
	}
}
func main()
{
	let task: Power = Power();
	// Test Cases
	task.nearestPower2(10);
	task.nearestPower2(31);
	task.nearestPower2(64);
	task.nearestPower2(43);
}
main();

Output

 Number :  10
 Power :  8

 Number :  31
 Power :  16

 Number :  64
 Power :  64

 Number :  43
 Power :  32
/*
  Kotlin program
  Find nearest power of 2 less than or equal to a number
*/
class Power
{
	// Find nearest power of given number
	fun nearestPower2(num: Int): Unit
	{
		var n: Int = num;
		// First set all bits
		n = n or (n shr 1);
		n = n or (n shr 2);
		n = n or (n shr 4);
		n = n or (n shr 8);
		n = n or (n shr 16);
		// Get final result
		// n are indicates all active bits of given a number
		// So shift n one by left and perform xor operation
		n = n xor (n shr 1);
		// Display calculated result
		print("\n Number : " + num);
		print("\n Power : " + n + "\n");
	}
}
fun main(args: Array <String> ): Unit
{
	var task: Power = Power();
	// Test Cases
	task.nearestPower2(10);
	task.nearestPower2(31);
	task.nearestPower2(64);
	task.nearestPower2(43);
}

Output

 Number : 10
 Power : 8

 Number : 31
 Power : 16

 Number : 64
 Power : 64

 Number : 43
 Power : 32



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