Can you buy 1 share of a company?

Sure, I'd be happy to provide a description in the tone of a questioner, based on the given paragraph. Here it is: "Excuse me, I was wondering if I could buy just one share of a company? I've been interested in investing in the stock market but I'm not sure if I can afford to buy a large number of shares at once. Is it possible to purchase just a single share of a company, or do I need to buy a minimum number of shares in order to invest?