JAVA CODE

//Sum2 program

import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;

public class Sum2 extends Applet
             implements ActionListener

{
  Label Prompt;
  TextField NumText;
  int Num;
  

  public void init()
  {
    Prompt = new Label("Enter a number : ");
    add(Prompt);

    NumText = new TextField(3);
    add(NumText);
    NumText.addActionListener(this);
  }

  public void paint( Graphics g )
  {
    double sum = 0;
    for (int i=1; i<=Num; i++)
    {
      sum = sum+1.0/i;
    }
      g.drawString(" The Sum is " + sum, 20, 20 );

    int sqrsum = 0;
    for (int i=1; i<=Num; i++)
    {
      sqrsum = sqrsum + i*i;
    }
      g.drawString(" The Sqrsum is " + sqrsum, 50, 50 );
   }

   public void actionPerformed( ActionEvent e )
   {
     Num = Integer.parseInt(NumText.getText());
     repaint();
   }
}