Sum of the series 1 + (1+2) + (1+2+3) + (1+2+3+4) + …… + (1+2+3+4+…+n)
Given the value of n, we need to find the sum of the series where i-th term is sum of first i natural numbers.
Examples :
Input : n = 5
Output : 35
Explanation :
(1) + (1+2) + (1+2+3) + (1+2+3+4) + (1+2+3+4+5) = 35
Input : n = 10
Output : 220
Explanation :
(1) + (1+2) + (1+2+3) + .... +(1+2+3+4+.....+10) = 220
// JAVA Code For Sum of the series
import java.util.*;
class GFG {
// Function to find sum of given series
static int sumOfSeries(int n)
{
int sum = 0;
for (int i = 1 ; i <= n ; i++)
for (int j = 1 ; j <= i ; j++)
sum += j;
return sum;
}
/* Driver program to test above function */
public static void main(String[] args)
{
int n = 10;
System.out.println(sumOfSeries(n));
}
}
Tags:
java