C++ provides built-in and user-defined data types. Built-in data types are pre-defined in C++ and include character, integer, floating point, double, void, and boolean. User-defined data types are composed of built-in types and include arrays, structures, unions, classes, and pointers. Data types determine the type of data that can be stored and the operations that can be performed on that data.

2. A data type determines the type and the operations
that can be performed on the data. C++ provides
various data types and each data type is represented
differently within the computer's memory.

3. Classified of Basic Data Types in C++
There are many data-types available in C++.
They are classified under two categories:
Built-In or Fundamental Data types
Derived or User-Defined Data types

4. DATA TYPES
FUNDAMENTAL DATA
TYPES
USER DEFINED DATA
TYPES
DATA TYPE MODIFIERS
DERIVED DATA TYPES
Basic Data Types in C++

6.  Built-in data types are the most basic data-types in C++.
 The term built-in means that they are pre-defined in C++
and can be used directly in a program.
Example:
• Character char
• Integer int
• Floating point float
• Double floating point double
 Apart from these, we also have void and bool data types.

7. They are composed of built-in data types.
Examples are :
array, structure, union, class, pointers etc

8. User-Defined Data types
User-defined data types are those which are
first declared and defined by the user before
use.
Example: struct ; union ; class; enumeration; are
User defined types

9. Char: Characters refer to the alphabet, numbers and other
characters (such as {, @, #, etc.) defined in the ASCII character set.
Int: Numbers without the fractional part represent integer data. In C++, the int
data type is used to store integers such as 4, 42, 5233, -32, -745.
Floating point Data Type: A floating-point data type is used to store real
numbers such as 3 .28, 64. 755765, 8.01, -24.53.
Void: The void data type is used for specifying an empty parameter list unction
and return type for a function.
Bool : The boo1data type can hold only Boolean values, that is; either true or false,
where true represents 1 and false represents 0.

10. Array : An array is a set of elements of the same data type that are referred to
by the same name.
Function: A function is a self-contained program segment that carries out a
pacific well-defined task.
Reference: A reference is an alternative name for a variable.
That is, a reference is an alias for a variable in a program.

11. 11Hridoy || Roll 20 || CSE E42 || OOP || DIU