The conversation between human and AI assistant.
Why and how is 0! =1?
That makes sense. Are there any other interesting facts about factorials?
Yes, there are many interesting properties of factorials. For example, the ratio of consecutive factorials approaches e (the base of natural logarithms) as the factorials get larger. Additionally, the sum of the reciprocals of factorials converges to a number called e^x, and this result has numerous applications in various fields of science and engineering.