/*<applet code="Factorial.class" width=400 height=200>
  </applet>
*/
import java.awt.*;
import java.applet.Applet;
public class Factorial extends Applet
{
Label prompt;
TextField input;
Button ejecuta;
int num1;
int fact, i;
public void init()
{
prompt = new Label("Ingresa un entero :");
input = new TextField(10);
ejecuta = new Button("Ejecutar");
add(prompt);
add(input);
add(ejecuta);
}
public void paint(Graphics g)
{
g.drawString("El resultado de el factorial es:",70,75);
  g.drawString("factorial de:"+num1+"es"+fact ,100,110);
}
public boolean action(Event e, Object O)
{
if(e.target==ejecuta)
{
num1=Integer.parseInt(input.getText());
fact=1;
for(i=num1; i>0; i--){
  fact*=i;
}
repaint();
}
return true;
}
}