Not quite. That's how i do it. I use my credit card all month for all my purchases and then pay the balance in full at the end of the cycle. This way, I use their money for free all month (since i'm not carrying a balance, I never pay interest) while my money keeps gaining interest.
I mean, you could do it the other way and get reamed on interest....but I don't like paying more for things than I have to. More importantly, though, is this builds my credit history (the whole using my credit card instead of debit card/cash) thing. I have an extremely good credit score and I've just graduated from college this past may.