What is a Function? https://www.youtube.com/watch?v=9w8VnZWr8tg&t=1s Definition of function Function can be easily defined with the help of the concept of mapping. Let X and Y be any two non-empty sets. “A function from X to Y is a rule or correspondence that assigns to each element of set X, one and only one element of set Y”. Let the correspondence be ‘f’ then … [Read more...] about What is a Function?