Abstract Datatype

Monalisa Priyadarsini

10y1kVisual Basic .NET

Which one comes under Abstract Datatype?

int, string, double, class

6 Replies

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Sujeet Suman10y ago
Monalisa class is an Abstract Data Type where as int, string, double are Primitive Data Type.
Monalisa Priyadarsini10y ago
thanks a lot
Rajesh Singh10y ago
Hi Monalisa

An abstract data type is a theoretical concept (a collection of function signatures and rules) to describe the values that a type can have by defining how these values can be constructed and which constructions create the same values.

Objects are not ADTs (*). (So in C# String,double and Int32 are not ADTs.)

An Abstract Data Type (ADT) is any type whose internal implementation can change without affecting code that uses it. By "internal implementation", I mean that the interface (API, if you wish) for the ADT remains.
In that sense, the classic "internals-hiding" class implements an ADT, it would be possible to have a parallel implementation with different internal implementation, as long as the API remains unchanged.
Ranjit Powar10y ago
No one is ADT.
Munesh Sharma10y ago
There are two parts to each ADT:
1. The public or external part, which consists of:
  the conceptual picture (the user's view of what the object looks like, how the structure is organized)
  the conceptual operations (what the user can do to the ADT)
2. The private or internal part, which consists of:
  the representation (how the structure is actually stored)
  the implementation of the operations (the actual code)
In general, there are many possible operations that could be defined for each ADT; however, they often fall into these categories:
1. initialize
2. add data
3. access data
4. remove data
Munesh Sharma10y ago
Class is abstract datatype..
classes uses the concept of data abstraction , known as absract data type .
abstract data type is an older term to describe the concepts of stack and queues in terms of their functionality without describing their implementation .