import java.util.*;
public class lingkaran
{
public static void main(String[] args)
{
Scanner input = new Scanner(System.in);
double phi = 3.14;
double r, luas,keliling;
System.out.println("Program Luas Lingkaran\n");
System.out.print("Masukkan Panjang Jari-jari : ");
r = input.nextDouble();
luas = 0.5 * phi * r * r;
keliling = 2 * phi * r;
System.out.print("Luas Lingkaran = " + (int)luas + " \nKeliling lingkaran = "+ (int)keliling);
}
}
Hasil :
