luas linkaran!!

it's the second program,,it's simple and try the other basically of this....

import java.util.Scanner;
public class LuasLingkaran{
public static void main (String [] args){
Scanner input = new Scanner (System.in);
float phi=(float)3.14, luas, jari2;
System.out.println("masukkan jari-jari lingkaran : ");
jari2 = input.nextFloat();
luas = phi*jari2*jari2;
System.out.println ("maka luas lingkaran adalah " + luas);
}
}

i hope it's useful and can help you^^