Calculate area of circle

Here given code implementation process.

// C Program
// Calculate area of circle 
#include <stdio.h>

#include <math.h>

//Calculate area of circle by given radius
void circle_area(double r)
{
	//r indicates radius of circle
	//M_PI containing π value 3.14159265358979323846
	double area = M_PI * (r * r);
	//Display the result of circle area
	printf("Circle Radius : %lf , Circle Area : %lf\n", r, area);
}
int main()
{
	//Test Cases  
	circle_area(63);
	circle_area(15.5);
	circle_area(34.47);
	return 0;
}

Output

Circle Radius : 63.000000 , Circle Area : 12468.981242
Circle Radius : 15.500000 , Circle Area : 754.767635
Circle Radius : 34.470000 , Circle Area : 3732.780387
/*
  Java program
  Calculate area of circle 
*/
public class CircleArea
{
	//Calculate area of circle by given radius
	public void circle_area(double r)
	{
		//r indicates radius of circle
		//Math PI containing π value nearly 3.141592653589793
		double area = Math.PI * (r * r);
		//Display the result of circle area
		System.out.print("Circle Radius : " + r + " , Circle Area : " + area + "\n");
	}
	public static void main(String[] args)
	{
		CircleArea obj = new CircleArea();
		//Test Cases  
		obj.circle_area(63);
		obj.circle_area(15.5);
		obj.circle_area(34.47);
	}
}

Output

Circle Radius : 63.0 , Circle Area : 12468.981242097889
Circle Radius : 15.5 , Circle Area : 754.7676350249478
Circle Radius : 34.47 , Circle Area : 3732.7803865757082
/*
  C++ program
  Calculate area of circle 
*/
#include<iostream>
#include <math.h>
using namespace std;
class CircleArea
{
	public:
		//Calculate area of circle by given radius
		void circle_area(double r)
		{
			//r indicates radius of circle
			//M_PI containing π value nearly 3.141592653589793
			double area = M_PI *(r *r);
			cout << "Circle Radius : " << r << " , Circle Area : " << area << "\n";
		}
};
int main()
{
	CircleArea obj =  CircleArea();
	//Test Cases  
	obj.circle_area(63);
	obj.circle_area(15.5);
	obj.circle_area(34.47);
	return 0;
}

Output

Circle Radius : 63 , Circle Area : 12469
Circle Radius : 15.5 , Circle Area : 754.768
Circle Radius : 34.47 , Circle Area : 3732.78
/*
  C# program
  Calculate area of circle 
*/
using System;
public class CircleArea
{
	//Calculate area of circle by given radius
	public void circle_area(double r)
	{
		//r indicates radius of circle
		//Math PI containing π value nearly 3.141592653589793
		double area = Math.PI * (r * r);
		Console.Write("Circle Radius : " + r + " , Circle Area : " + area + "\n");
	}
	public static void Main(String[] args)
	{
		CircleArea obj = new CircleArea();
		//Test Cases  
		obj.circle_area(63);
		obj.circle_area(15.5);
		obj.circle_area(34.47);
	}
}

Output

Circle Radius : 63 , Circle Area : 12468.9812420979
Circle Radius : 15.5 , Circle Area : 754.767635024948
Circle Radius : 34.47 , Circle Area : 3732.78038657571
<?php
/*
  Php program
  Calculate area of circle 
*/
class CircleArea
{
	//Calculate area of circle by given radius
	public 	function circle_area($r)
	{
		//r indicates radius of circle
		//M_PI  containing π value nearly 3.141592653589793
		$area = M_PI * ($r*$r);
		//Display the result of circle area
		echo("Circle Radius : ". $r ." , Circle Area : ". $area ."\n");
	}
}

function main()
{
	$obj = new CircleArea();
	//Test Cases  
	$obj->circle_area(63);
	$obj->circle_area(15.5);
	$obj->circle_area(34.47);
}
main();

Output

Circle Radius : 63 , Circle Area : 12468.981242098
Circle Radius : 15.5 , Circle Area : 754.76763502495
Circle Radius : 34.47 , Circle Area : 3732.7803865757
/*
  Node Js program
  Calculate area of circle 
*/
class CircleArea
{
	//Calculate area of circle by given radius
	circle_area(r)
	{
		//r indicates radius of circle
		//Math PI containing π value nearly 3.141592653589793
		var area = Math.PI *(r *r);
		//Display the result of circle area
		process.stdout.write("Circle Radius : " + r + " , Circle Area : " + area + "\n");
	}
}

function main(args)
{
	var obj = new CircleArea();
	//Test Cases  
	obj.circle_area(63);
	obj.circle_area(15.5);
	obj.circle_area(34.47);
}
main();

Output

Circle Radius : 63 , Circle Area : 12468.981242097889
Circle Radius : 15.5 , Circle Area : 754.7676350249478
Circle Radius : 34.47 , Circle Area : 3732.7803865757082
#   Python 3 program
#   Calculate area of circle 
import math
class CircleArea :
	# Calculate area of circle by given radius
	def circle_area(self, r) :
		# r indicates radius of circle
		# math.pi containing π value nearly 3.141592653589793
		area = math.pi * (r * r)
		
		# Display the result of circle area
		print("Circle Radius : ", r ," , Circle Area : ", area ,"\n", end = "")
	

def main() :
	obj = CircleArea()
	# Test Cases  
	obj.circle_area(63)
	obj.circle_area(15.5)
	obj.circle_area(34.47)


if __name__ == "__main__": main()

Output

Circle Radius :  63  , Circle Area :  12468.981242097889
Circle Radius :  15.5  , Circle Area :  754.7676350249478
Circle Radius :  34.47  , Circle Area :  3732.7803865757082
#   Ruby program
#   Calculate area of circle 

class CircleArea

	# Calculate area of circle by given radius
	def circle_area(r)
	
		# r indicates radius of circle
		# Math PI containing π value nearly 3.141592653589793
		area = Math::PI * (r * r)
		# Display the result of circle area
		print("Circle Radius  : ", r ," , Circle Area  : ", area ,"\n")
	end
end
def main()

	obj = CircleArea.new()
	# Test Cases  
	obj.circle_area(63)
	obj.circle_area(15.5)
	obj.circle_area(34.47)
end
main()

Output

Circle Radius  : 63 , Circle Area  : 12468.981242097889
Circle Radius  : 15.5 , Circle Area  : 754.7676350249478
Circle Radius  : 34.47 , Circle Area  : 3732.7803865757082
/*
  Scala program
  Calculate area of circle 
*/
class CircleArea
{
	//Calculate area of circle by given radius
	def circle_area(r: Double): Unit = {
		//r indicates radius of circle
		//Math PI containing π value nearly 3.141592653589793
		var area: Double = Math.PI * (r * r);
		//Display the result of circle area
		print("Circle Radius : " + r + " , Circle Area : " + area + "\n");
	}
}
object Main
{
	def main(args: Array[String]): Unit = {
		var obj: CircleArea = new CircleArea();
		//Test Cases  
		obj.circle_area(63);
		obj.circle_area(15.5);
		obj.circle_area(34.47);
	}
}

Output

Circle Radius : 63.0 , Circle Area : 12468.981242097889
Circle Radius : 15.5 , Circle Area : 754.7676350249478
Circle Radius : 34.47 , Circle Area : 3732.7803865757082
/*
  Swift program
  Calculate area of circle 
*/
class CircleArea
{
	//Calculate area of circle by given radius
	func circle_area(_ r: Double)
	{
		//r indicates radius of circle
		//Double.pi containing π value nearly 3.141592653589793
		let area: Double = Double.pi * (r * r);
		
		//Display the result of circle area
		print("Circle Radius : ", r ," , Circle Area : ", area ,"\n", terminator: "");
	}
}
func main()
{
	let obj: CircleArea = CircleArea();
	//Test Cases  
	obj.circle_area(63);
	obj.circle_area(15.5);
	obj.circle_area(34.47);
}
main();

Output

Circle Radius :  63.0  , Circle Area :  12468.9812420979
Circle Radius :  15.5  , Circle Area :  754.767635024948
Circle Radius :  34.47  , Circle Area :  3732.78038657571


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