write a java program to accept the value of radius from user and calculate area of circle and display it using Scanner class.

Program :

import java.util.Scanner;

class Circle

{

    public static void main(String[] args) {

        double rad , a ;

Scanner sc = new Scanner (System.in) ;

System.out.println(" Enter Radius : ");

        rad = sc.nextFloat();

a = 3.14 * rad * rad;

        System.out.println("Area of Circle is  : "+a);

    }

}

Output :