C Program to Find Sum of Series 1^2 + 2^2 + …. + n^2

/*
 * C Program to find the sum of series 1^2 + 2^2 + …. + n^2.
 */
#include <stdio.h>
 
int main()
{
    int number, i;
    int sum = 0;
 
    printf("Enter maximum values of series number: ");
    scanf("%d", &number);
    sum = (number * (number + 1) * (2 * number + 1 )) / 6;
    printf("Sum of the above given series : ");
    for (i = 1; i <= number; i++)
    {
        if (i != number)
            printf("%d^2 + ", i);
        else
            printf("%d^2 = %d ", i, sum);
    }
    return 0;
}

Output:

Enter maximum values of series number: 4
Sum of the above given series : 1^2 + 2^2 + 3^2 + 4^2 = 30