无法返回变量

Question

我试图返回变量val并在不使用print语句的情况下打印出未来值，编译器说它很好但不会返回值。

import java.util.Scanner;
public class FutureValues{

  public static Scanner scan = new Scanner( System.in);
  public static void main(String[] args){
    double currentAmount = scan.nextDouble();
    double rate = scan.nextDouble();
    double year = scan.nextDouble();
    FutureValue(currentAmount,rate,year);
  }
  public static double FutureValue(double p, double r, double y){

    double rate = r/100.0;
    double fv = p*(1 + rate);
    double val = Math.pow(fv,y);
    return val;
  }
}