Loans are financial instruments where a lender provides a sum of money to a borrower, who agrees to repay the amount with interest over a specified period. These agreements typically involve the borrower receiving immediate funds in exchange for the promise of future repayment, often with a predetermined schedule of installments. Loans are common in personal finance, business transactions, and government funding, playing a crucial role in enabling individuals and organizations to make significant purchases or investments that they may not be able to afford upfront.