Source:

// Question 8.10
import java.applet.Applet;
import java.awt.*;

public class q810 extends Applet

{
float n = 1, i = 2;

public void paint (Graphics g)
{
while (i < 10000)
{
if (Math.pow(-1,i) > 0)
n -= 1/i;
else
n += 1/i;
i++;
}
g.drawString ("When term is reached that is less than 0.0001 means < 1/10000",20,30);
g.drawString ("thus,",20,50);
g.drawString ("1 - 1/2 + 1/3 - 1/4 + .... + 1/9999 = "+n,20,70);
}
}