Data Types in C++

C++ Data Types

Data Types are used to define the operations and store each of them. It can be classified into three major categories:

1. User-defined data type

2. Built-in data type

3. Derived data type

In C++, User-defined data types are Structure, Union, Class, enum etc.

Structure: Structures are used for grouping elements with dissimilar types. It is often required to group logically related data items. It has the following syntax:

struct name
{
data type member1;
data type member2;
..............
}

Union: Unions are conceptually similar to structures, it allows us to group dissimilar type elements inside a single unit. In unions, the same memory space is used for representing different member elements. As a result, union members can only be manipulated exclusively by each other. It has the following syntax:

union name
{
data type member1;
data type member2;
..............
}

Class: In C++, Class is a user-defined data type which is used to declare variables.
Enum: An enumerated data type is also a user-defined data type which provides a way for attaching names to numbers, increasing the comprehensibility of the code. The enum keyword is used to assign those enumerate values.

enum shape{square, cirle};
enum color{blue, green};

In C++, Built-in data types are given as follows: