import javax.swing.*;
public class Intro {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		System.out.println("hello there");
		String s;
		s = JOptionPane.showInputDialog("Enter an integer please");
		int n;
		n = Integer.parseInt(s);
        //intLoop(n);
		//floatLoop(n);
		doubleLoop(n);
	}
	public static void intLoop(int n){
		int j;
		int x = 1;
		for (j=0; j<n; j++){
			System.out.println("2 to the power " + j + " is " + x);
			x = 2*x;
		}
	}
	public static void floatLoop(int n){
		int j;
		float x = 1;
		for (j=0; j<n; j++){
			System.out.println("2 to the power " + j + " is " + x);
			x = 2*x;
		}
	}
	public static void doubleLoop(int n){
		int j;
		double x = 1;
		for (j=0; j<n; j++){
			System.out.println("2 to the power " + j + " is " + x);
			x = 2*x;
		}
	}

}