I need help with 2πr - Write a small program that will calculate and print the perimeter of a circle for you.

Question

My faulty code below:

import java.util.Scanner;

public class Main {

public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
double pi = 3.14;
//your code goes here
p = scanner.nextline();
double newVar = p * pi * pi;
System.out.println("The perimeter of a circle is: " + newVar);
}
}

Answer 1

Harrison Rogers

Why there is pi * pi ?

Check formula again

2PI doesn't mean PI * PI it is 2 * PI

Answer 2

2πr means 2 * pi * r
not pi^2 *r

Answer 3

Thank you for the help.