CPP

c++ type of a variable

#include<iostream>
using namespace std;
main()
{
auto variable = 45;
cout << typeid(variable).name() << endl;
}

Data Types in C++

 						  Data types in c++
	Built-in                User Defined            Derived
    ----------              -----------             ------------
    void, int,			    structure,              array,
	char, float,		    union,					function,
    double, bool,		    enum,					pointer,
    long long			    class,					reference
    Wide Character		    typedef

data types in c++

int myNum = 5;               // Integer (whole number)
float myFloatNum = 5.99;     // Floating point number
double myDoubleNum = 9.98;   // Floating point number
char myLetter = 'D';         // Character
bool myBoolean = true;       // Boolean
string myText = "Hello";     // String

C++ Variable Types

Type 			 Description

bool				Stores either value true or false.
char				Typically a single octet (one byte). This is an integer type.
int					The most natural size of integer for the machine.
float				A single-precision floating point value.
double				A double-precision floating point value.	
void				Represents the absence of type.
wchar_t				A wide character type.

c++ variable type

// Example
std::cout << "Data-type = " << typeid(YourVariable).name() << "
";
  
// Syntax
typeid(YourVariable).name()

c++ data types

// Following is the example, which will produce correct size of various data types on your computer.
 
#include <iostream>
using namespace std;
 
int main()
{
    cout << "Size of char : " << sizeof(char) << endl;
    cout << "Size of int : " << sizeof(int) << endl;
     
    cout << "Size of long : " << sizeof(long) << endl;
    cout << "Size of float : " << sizeof(float) << endl;
     
    cout << "Size of double : " << sizeof(double) << endl;
     
      return 0;
}

C++ Data Types

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