Question

How to calculate area, diameter and circumference of circle in Java

Answer 1

package javaapplication1;
 
public class Example {
     
    public static void main(String[] args) {
                
        int radius = 3;
        float PI = 3.14f;

        float area = PI * radius * radius;
        System.out.format("Area = %.2f\n", area);

        float diameter = 2 * radius;
        System.out.format("Diameter = %.2f\n", diameter);

        float circumference = 2 * PI * radius;
        System.out.format("Circumference = %.2f\n", circumference);
    }
}
    
    
/*
run:
 
Area = 28.26
Diameter = 6.00
Circumference = 18.84
     
*/

 

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