C++ DataType

In this tutorial, we will learn about basic data types such as int, float, char, etc. The data type of C++ programming will learn with the help of examples.

A data type specifies the type of data that a variable can store such as integer, character and floating etc. For example,

int count = 3;

Here, count is a variable of type int. Meaning, the variable can only store integers of either 2 or 4 bytes.

Datatype in C++ language

The table below shows the data types in C++ language

 Types

 Data Types

 Basic Data Type

 int, char, float, double, etc

 Derived Data Type

 array, pointer, etc

 User Defined Data Type

 structure

C++ Basic Data Types

The table below shows the Basic data types, their meaning, and their sizes (in bytes):

 Data Type

 Meaning

 Size (in Bytes)

 int

 Integer

 2 or 4

 float

 Floating point

 4

 double

 Double Floating point

 8

 char

 Character

 1

 wchar_t

 Wide Character

 2

 bool

 Boolean

 1

 void

 Empty

 0

1. C++ Int
• The int keyword is used to store integers (whole numbers), without decimals, s.
• Its size is usually 4 bytes. Meaning, it can store values from -2147483648 to 2147483647.
• For example: Create a variable called count of type int and assign it the value 3
int count = 3;
• Also Declare a variable count of type int without assigning the value, and assign the value later
int count;
count = 3;