What is the purpose of Nullable types in C#? Can we just assign a value of 0 instead of using null?

Question

I cannot seem to grasp the concept of Nullable type. Can someone enlighten me?

Answer 1

0 is a value, null means not set.

If you bring 0 kids to a party, it means that you will come on your own or with a partner.

If you bring null kids to a party, it means that you have not defined yet if you bring your kids or not.