what purpose we use return statement, what are the necessities?

Question

please someone explain me easily

Answer 1

http://www.sololearn.com/Discuss/51734/what-is-return-how-to-understand-easily

Answer 2

A function doesn't have to return anything. But, if you need to use what that particular function does in later part of code, you need to use return to extract a value out of it.