<prompt> Human: Im 21, and I dont currently have a job, but I probably will get a job soon. So, I know you can build up your credit through a credit card, and I read some stuff on here. I know almost nothing about having a credit card. Obviously, once I get a job, I plan on getting a savings account at my parents bank, which seems like a good bank. I read that you have to pay back whatever you buy with your card, but how do you do that? Is it automatically removed from your bank account? What are things I should know about owning a credit card, and bank related stuff as far as opening one?Any advice is wanting. Thank you!  <response>: I read that you have to pay back whatever you buy with your card, but how do you do thatThey send you a bill. Then you either mail them a check or set up online payments where they will take the money directly from your bank account. What are things I should know about owning a credit cardAlways pay the full balance every month. Always. 