Computer Applications

Write Java program to find the sum of the given series:

1 + 1 / (1+2) + 1 / (1+2+3) + ………. + 1 / (1+2+3+…..+n)

Java

Java Nested for Loops

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Answer

import java.util.Scanner;

public class KboatSeriesSum
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter n: ");
        int n = in.nextInt();
        double sum = 0.0;
        for (int i = 1; i <= n; i++) {
            long term = 0;
            for (int j = 1; j <= i; j++) {
                term += j;
            }
            sum += (1.0 / term);
        }
        System.out.println("Sum=" + sum);
    }
}

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