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CPP Data Types

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CPP Data Types are used to define the type of data that is to be stored. CPP data types can be classified into 4 groups:

Basic Data Types:

  1. Integer
  2. Float
  3. Double
  4. Character

Derived Data Types:

  1. Array
  2. Pointer

Enumeration Data Types:

  1. Enum

User Defined Data Types:

  1. Structure

 

Basic Data Types:

Integer: All the non-decimal numbers are called as Integers. Various forms of integers are listed below.

Data Types SIZE (Byte)

For 32 bit

RANGE
short 2 −32,768 to 32,767
signed short 2 −32,768 to 32,767
unsigned short 2 0 to 65,535
int 2 −32,768 to 32,767
signed int 2 −32,768 to 32,767
unsigned int 2 0 to 65,535
short int 2 −32,768 to 32,767
signed short int 2 −32,768 to 32,767
unsigned short int 2 0 to 65,535
long int 4 -2,147,483,648 to 2,147,483,647
signed long  int 4 -2,147,483,648 to 2,147,483,647
unsigned long int 4 0 to 4,294,967,295

Float:

Float represents all the decimal and exponential numbers. The float size is of 4 bytes.

Double:

Double also represents all the decimal and exponential numbers. Various forms of double are listed below.

Data Types SIZE (Byte) For 32 bit
double 8
long double 10

Character:

Various forms of characters are listed below.

Data Types SIZE (Byte) RANGE
char 1 −128 to 127
signed char 1 −128 to 127
unsigned char 1 0 to 255

 

Example:

#include <iostream.h>
using namespace std; 
int main()
{
int num1;
float num2;
char ch;
cout << "Enter an integer: ";
cin >> num1;
cout << "Enter a decimal number: ";
cin >> num2;
cout << "Enter a letter: ";
cin >> ch;
cout << “You Entered an Integer: ” << num1 << endl; 
cout << “You Entered a Decimal Value: ” << num2 << endl; 
cout << “You Entered a Character: ” << ch << endl; 
return 0;
}

Output:

Enter an integer: 5
Enter a decimal number: 4.5
Enter a letter: A
You Entered an Integer: 5
You Entered a Decimal Value: 4.5
You Entered a Character: A