Calculating Perimeter of a circle | Java

Question

I explained the problem in the code as a comment

It says “ .class expected”

https://code.sololearn.com/c9OjgMAmku8E/?ref=app

Answer 1

Are you supposed to get user input for <radius> variable?

If so, then just go ahead and use the Scanner object to read a value for <radius>.

Answer 2

Thank you so much guys, i got it thanks to you Simba Ipang

Answer 3

import java.util.Scanner;

public class Main {

public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
double pi = 3.14;
//tu código va aquí

//double <radius>=nexscanner
double radius = scanner.nextDouble();
double per = 2*pi*radius;

System.out.println(per);

}
}

In my case y had problems because π is written pi in Java, first mistake. After that the thing was how to get the radius from the input the solution I tried first was scanner.nextInt(), that gave me a mistake because the results were in doubles, so I changed that to scanner.nextDouble() and finally it worked. Hope this could help someone.