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. âA 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 Yâ. Let the correspondence be âfâ then … [Read more...] about What is a Function?