area of octagon in java
import java.util.Scanner;
public class AreaOfOctagon
{
public static void main(String[] args)
{
Scanner sc = new Scanner(System.in);
System.out.println("Please enter length of side of octagon: ");
int side = sc.nextInt();
float area = (float) (2 * (1 + Math.sqrt(2)) * side * side);
System.out.println("Area of octagon is: " + area);
sc.close();
}
}