Find Sum of Series 1 ^ 2 | C ++ program to find sum of series 1 ^ 2 - 2 ^ 2 + 3 ^ 3 - 4 ^ 4 + ... ; Function to find sum of series ; If i is even ; If i is odd ; return the result ; Driver Code ; Get n ; Find the sum ; Get n ; Find the sum
#include <bits/stdc++.h> NEW_LINE using namespace std ; int sum_of_series ( int n ) { int result = 0 ; for ( int i = 1 ; i <= n ; i ++ ) { if ( i % 2 == 0 ) result = result - pow ( i , 2 ) ; else result = result + pow ( i , 2 ) ; } return result ; } int main ( void ) { int n = 3 ; cout << sum_of_series ( n ) << endl ; n = 10 ; cout << sum_of_series ( n ) << endl ; }