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C++ program to find the sum of the series (1*1) + (2*2) + (3*3) + (4*4) + (5*5) + … + (n*n)
In this tutorial, we will be discussing a program to find the sum of the given series (1*1) + (2*2) + (3*3) + (4*4) + (5*5) + … + (n*n).
For this, we will be given with the value of n and our task is to add up every term starting from the first one to find the sum of the given series.
Example
#include <iostream> using namespace std; //calculating the sum of the series int calc_sum(int n) { int i; int sum = 0; for (i = 1; i <= n; i++) sum += (i * i); return sum; } int main() { int n = 7; int res = calc_sum(n); cout << res << endl; return 0; }
Output
140
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