Area of a Circle

JAVA PROGRAMMING LANGUAGE 


OUTPUT

CODE STARTS HERE:


package area.of.a.circle;
public class AreaOfACircle {

public static void main(String[] args) {

int radius = 3;
System.out.println("The radius of the circle is " + radius);
/** Area of a circle is pi * r * r where r is a radius of a circle.*/

// NOTE : use Math.PI constant to get value of pi
double area = Math.PI * radius * radius;

System.out.println("Area of a circle is " + area);
}
}