Series.java

public class Series {
 double series(double n) {
 double sum = 0;
 for (int i = 1; i <= n; i++) {
 double term = 1.0 / i;
 sum += term;
 }
 return sum;
 }

 double series(double a, double n) {
 double sum = 0;
 int x = 1;
 for (int i = 1; i <= n; i++) {
 int e = x + 1;
 double term = x / Math.pow(a, e);
 sum += term;
 x += 3;
 }
 return sum;
 }

 public static void main(String args[]) {
 Series obj = new Series();
 System.out.printf("First series sum = %.4f\n", obj.series(5));
 System.out.printf("Second series sum = %.4f\n", obj.series(3, 8));
 }
}