Nullable types

Reference types, Value types, and Patterns - slide 16 : 29

Nullable types

A variable of reference type can be null

A variable of value type cannot be null

A variable of nullable value type can be null

An integer sequence with Min and Max operations - a naive attempt.

An integer sequence with Min and Max operations - with int?.

A client of IntSequence.

Program output.

Nullable types in C#:
- Many operators are lifted such that they also are applicable on nullable types
- An implicit conversion can take place from t to t?
- An explicit conversion (a cast) is needed from t? to t