import java.util.Scanner;
public class Main
{
public static void main (String[]args)
{
Scanner inp = new Scanner (System.in);
System.out.println ("This program approximates the Riemann zeta function");
System.out.println ("through straightforward addition.");
System.out.println ("Input 0 to stop.");
double x = 1;
while (x != 0)
{
System.out.print ("\nEnter a zeta input: ");
x = inp.nextDouble ();
if (x != 0)
{
double sum = 0;
for (int n = 1; n < 99; n++)
{
sum += Math.pow (n, -x);
}
System.out.println ("Zeta(" + x + ") = " + sum);
}
}
}
}