Data Types in C++ Programming Language

To limit the data that can be stored, all variables declare Data Types in C++. Data can be of many types such as character, integer, real, etc.

C++ Programming Language like any other language provides many ways and facilities to handle different types of data by providing data types.

Data types in C++ are declarations of variables. This defines the type and size of data that is associated with variables. This could be, for example:

int ball = 42;

Here, the ball is a variable of type int, and int has 2 or 4 bytes of storage memory. This means the variable can store the integer in either 2 or 4 bytes.

C++ Data Types

Data types are means to identify the type of data and associated operations for handling it, which means how much memory we are allocating to a variable depends on data types. There are three types of data types:

1. Primitive Data Type
2. Derived Data Type
3. User-defined Data Type

1. Primitive Data Types-

They are predefined or built-in data types and for declaring variables they can be directly used. Primitive data types in c++ are:

• Integer
• Character
• Boolean
• Float
• Double
• Void

1. Integer Type

• An integer is a keyword used to describe integer data types.
•  Integers usually require 4 bytes of memory space.
• It can range from -21474836484848 to 2147483647.
• For Example:

int age = 85;

2. Character

• Character is used to store characters. 
• char is the keyword used to define the character data type. 
• Characters usually require 1 byte of memory space.
• It can range from -128 through 127, 0 to 255, and 0 to 255.
• For Example:

char name = 'r';

3. Boolean

• This data type uses boolean and logical values to store. 
• A boolean variable stores true or false. 
• bool is the keyword used to describe boolean data types.
• For Example:

bool ans = false;

4. Floating-Point

• The data type for floating-point values is used to store single-precision floating points values.
•  float is the keyword for floating-point data types. 
• Float variables usually require 4 bytes of memory space.
• For Example

float size = 64.74;

5. Double

• The double data type can be used to store double-precision floating-point values or decimal numbers. 
• double is the keyword for the double floating points data type. 
• Double variables usually require 8 bytes of memory space.
• For Example

double height = 45E12

6. Void 

• Void is a text that has no value. 
• A void data type is an entity without value. 
• A function that does not return a value is called void data type.

2. Derived Data Type

These data types come from built-in or primitive data types are called Derived Data Types. They can be one of the following types:

• Function
• Array
• Pointer
• Reference

3. User-defined Data Type

These data types can be defined by the user. For example, you can define a class or structure in C++. C++ offers the following data types that can be customized by users:

• Class
• Structure
• Union
• Enumeration or Enum

We will learn in brief about derived data types and user-defined data types in later tutorials.

Type Modifier in C++

You can modify certain fundamental data types further by using type modifiers. C++ has four types of modifiers. These are:

1. signed
2. unsigned
3. short
4. long

You can modify the data types below using the modifiers.

• int
• double
• char

Type modifiers can be used in C++ programming to modify the meaning of fundamental data types.

Type modifiers can be used in C++ programming to modify the meaning of fundamental data types.

There are lots of topics yet to cover and we will do it in further blogs. Some topics are:

1. Introduction to C++ Programming Language
2. Installation of C++
3. Data Types in C++
4. Variables in C++ Programming Language
5. C++ Operators and Expressions

and many more topics are yet to come, so be updated to our website (BeAware World)

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