TCS NQT• Prep

Area Of Circle

Here is the optimized solution in Java. Copy or view it below.

Java

package Problems_On_Number;

import java.util.Scanner;

public class AreaOfCircle {

    public static void areaOfCircle(int n) {

        double ans = 3.14 * n * n; // Area of circle = πr2
        System.out.print("Area of circle is : " + ans);

    }

    public static void main(String args[]) {
        Scanner sc = new Scanner(System.in);
        System.out.println("enter the number:");
        int n = sc.nextInt();
        areaOfCircle(n);
        sc.close();
    }
}