Java Calculate Circle Area

Area of a circle = pi * r * r.
where:
r is the radius of the circle.
pi is a mathematical constant.

Program to Calculate Circle Area using Java.

Plain text
Copy to clipboard
Open code in new window
EnlighterJS 3 Syntax Highlighter
/**
* Program to Calculate Circle Area using Java Example.
* @author W3schools360
*/
public class CirleAreaExample {
static void circleArea(int radius){
double area = Math.PI * radius * radius;
//Print Circle Area.
System.out.println("Circle area: " + area);
}
public static void main(String args[]){
//method call
circleArea(20);
}
}
/** * Program to Calculate Circle Area using Java Example. * @author W3schools360 */ public class CirleAreaExample { static void circleArea(int radius){ double area = Math.PI * radius * radius; //Print Circle Area. System.out.println("Circle area: " + area); } public static void main(String args[]){ //method call circleArea(20); } }
/**
 * Program to Calculate Circle Area using Java Example.
 * @author W3schools360
 */
public class CirleAreaExample {
	static void circleArea(int radius){
		 double area = Math.PI * radius * radius;
         //Print Circle Area.
         System.out.println("Circle area: " + area);
	}	
	
	public static void main(String args[]){ 
		//method call 
		circleArea(20); 
	}
}

Output:

Plain text
Copy to clipboard
Open code in new window
EnlighterJS 3 Syntax Highlighter
Circle area: 1256.6370614359173
Circle area: 1256.6370614359173
Circle area: 1256.6370614359173