series program : 1 + 2 + 3 + 4 + 5 + ... + n

1 + 2 + 3 + 4 + 5 + ... + n

int main()
{
    int i,n,sum=0;
    n=10;
    for(i=1;i<=n;i++)
    {
        sum+=i;
    }
    printf("Sum: %d",sum);
    return 0;
}