Homework 10-24 (1) Lab exponential

import javax.swing.JOptionPane;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
public class Untitled4
{
public static void main(String[] args) throws IOException
{
String myString=JOptionPane.showInputDialog("Enter a number:");
int x= Integer.parseInt(myString);
int i=0;
double T=1,j=1;
while(i<170)
{
i+=1;j*=i;
T+=(double)(x)/j; x*=x;
if(i==10)
{
System.out.println("n=10 "+T);
}
else if(i==50)
{
System.out.println("n=50 "+T);
}
else if(i==100)
{
System.out.println("n=100 "+T);
}
}
}
}