Nullable types are value types that can take null as value. The default value of it a nullable type is null.
int? x = null; //no value
dynamic type is a static type, but in most cases, type ‘dynamic’ behaves like it has type object.
dynamic bypasses static type checking - variables of type dynamic are compiled into variables of type object.
Therefore, type dynamic exists only at compile time, not at run time
dynamic dx = 10; dynamic dy = "quick brown fox jumped over the lazy dog";