Ask coding questions

← Back to all posts
##### why wont it run

import java.util.Scanner;

public class Circle
{
public static void main(String[] args)
{
//declarations
Scanner scan = new Scanner(System.in);
final double PI = Math.PI;
int radius, radius2;
double area, area2, circ, circ2;
double divideArea,divideCirc;
//inputs
System.out.println("Enter radius 1:");
radius=scan.nextInt();
System.out.println("Enter radius 2:");
radius2=scan.nextInt();

``````  //calc
area= PI * Math.pow(radius,2);
circ=2*PI*radius;
area2= PI * radius2 * radius2;
circ2=2*PI*radius2;

divideArea=area2/area;
divideCirc=circ2/circ;

//outputs
System.out.println("The area of a circle with radius " + radius + " is " +area);
System.out.println("the circumference with radius is " + radius + " is " +circ);
System.out.println("The area of a circle with radius " + radius2 + " is " +area2);
System.out.println("the circumference with radius is " + radius2 + " is " +circ2);

System.out.println("Radius doubled with area:" +divideArea);
System.out.println("Radius doubled with circumference:" +divideArea);

}``````

}

##### Comments
hotnewtop
Geocube101 (628)

On Repl.it the class in the Main.java file must be named "Main"
On line 3, change `public class Circle` to `public class Main`