Question

How to calculate the area of a circle with constant PI in Java

Answer 1

package javaapplication1;

public class Example {
    
    public static final double PI = 3.14;
    
    public static void main(String[] args) {
               
        double radius, area;
 
        radius = 13.0;
        area = PI * radius * radius;
        
        System.out.format("Area = %.2f\n", area);
    }
}
 
/*
run:
  
Area = 530.66
  
*/

 

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