A lease is a contract, so once you sign it you are legally bound to abide by its terms, including paying rent for the full duration. Violating the terms of your lease can have serious consequences including fines, loss of all or part of your security deposit, and possibly eviction.
MSU's Student Legal Services program is managed by the Associated Students of Montana State University (ASMSU). Please thank your student government for prioritizing legal services for MSU students!