Euler Problem-finding difference between sum of square and square of sum problem. ( C language )

solving maths problems using C language.

 /*

The sum of the squares of the first ten natural numbers is,

 1^2 + 2^2 + 3^2 + ... 10^2 = 385

The square of the sum of the first ten natural numbers is,

(1+2+3+4...........+10)^2 = 3025

Hence the difference between the sum of the squares of the first ten natural numbers

 and the square of the sum is .

 3025-385=2640

Find the difference between the sum of the squares of the first one hundred

natural numbers and the square of the sum.

 */

#include <stdio.h>

int main()

{

    int sum_upto;

    sum_upto = 100;

    int sum_of_squares = 0;

    int square_of_sum = 0;

    for (int i = 1; i <= sum_upto; i++)

    {

        sum_of_squares += (i * i);

        square_of_sum += ( i );

    }

    square_of_sum *= square_of_sum;

    int diff = square_of_sum - sum_of_squares;

    printf("Difference is : %d", diff);

    return 0;

}