When student loan payment begins and how long you can expect to pay them off varies by lender.
For repayment, you can usually find any combination of:
Being allowed to make payments during school—or not
Interest accruing during school, which you can pay—or not
Having a grace period after graduation—or not
For many lenders, the amount you start to pay back is a monthly minimum amount; however, some lenders have penalties for paying your loan off early.