Data Type in C++

 Data Types in C++

    While in the previous tutorial, we discuss the C++ variables with examples. Now we will discuss the Data types in C++.

 

      All data types restrict variables that the data to be stored in it. Whenever a variable is defined in C++, the compiler allocates some memory for that variable based on the data-type with which it is declared.

     There are Three Types of data types.

  

1. Primary Data Types 

                These data types are built-in or predefined data types and can be used directly by the user to declare variables. example: int, char , float, boolean etc. Primitive data types available in C++ are:  

• Integer
• Floating / Double Floating Points
• Character
• Boolean
• void
• wide character

    2. Derived  Data Types 

          The data-types that are derived from the primitive or built-in data types are referred to as Derived Data Types. Derived data type are given below:

• References
• Pointers
• Function
• Arrays

    3. User Defined data types

          These data types are defined by user itself. Like, defining a class in C++ or a structure. Following  are the types of User-defined data-types:

• Class
• Structure
• Enum
• Unions
• Typedef

 

    Lets discuss Primary data type in C++.

•  Integers Keyword use in Integers are int. Basically int  takes 4 bytes memory space range from -2147483648 to 2147483647.
• Boolean is used for storing boolean or logical values in c++. Typically its stores true and false.
• Character Character used char  as data type and store character value. Its take 1 byte of memory space range from -128 to 127 or 0 to 255. 
• void  void means without any value. void datatype represents a valueless entity. Its is used when function does not have data type.
• Floating points: Keyword used for floating point data type is float. It is used for storing single precision floating point values or decimal values and take 4 byte of memory space.

 

Here is Example of Data type which show size of data types