What is the purpose of null?

Question

I am in a compilers class and we are tasked with creating our own language, from scratch. Currently our dilemma is whether to include a \'null\' type or not. What purpose do

Answer 1

A practical example of null is when you ask a yes/no question and don't get a response. You don't want to default to no because it might be important to know that the question wasn't answered in situations where the answer is very important.