Every entity has a type. What is a type? A type is a property describing the set of possible values and operations on those values. Instances of types are called objects. An object is a region in memory that has a type, a value, and possibly a name. An instance of a simple type is not to be confused with an instance of a class which is also called an object.
Fundamental Types
C++ has some built-in types. We often refer to them as fundamental types. A declaration is a statement that introduces a name into a current scope. ...