problem 25

#include <stdio.h>

int main ()
{
  int n;
  int sum = 0;
  printf("Enter a value of n: ");
  scanf("%d", &n);
  for (int i = 1; i <= n; i++)
  {
    sum += i * i;
  }
  printf("Answer of the series: %d", sum);
}

Enter a value for n: