On this website, it says the word for "Library" is 図書室 (としょしつ) but i thought it was 図書館 (としょかん)… - Feed Post by zerachcoakley

On this website, it says the word for "Library" is 図書室 (としょしつ) but i thought it was 図書館 (としょかん) Are both correct? And if so, is there any difference between them? (besides spelling, such as formality, etc.)