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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);}}
}
}