DATA types in C++ languages .

                                                            Data types

 

We already introduced data types earlier in the variables section.

Here is an example of a code with all the data types used for revision purpose.



this is the data types - 


Int - 4 bytes

Float - 4 bytes

Double - 8 bytes

Char - 1 byte

Bool – 1 byte


#include <iostream>
#include <string>

using namespace std;

int main () {

  // Creating variables
  int _Num = 5; // Integer 
  float _Float = 5.99; // Floating point number
  double _Double = 9.98; // Floating point number
  char _Char= 'G'; // Character
  bool _Bool = true; // Boolean
  string _String = "Namaste"; // String


  // Print variable values
  cout << "int: " << _Num << "\n";
  cout << "float: " << _Float << "\n";
  cout << "double: " << _Double<< "\n";
  cout << "char: " << _Letter << "\n";
  cout << "bool: " << _Bool << "\n";
  cout << "string: " << _String << "\n";

  return 0;
}



What is the difference between float and Double?

 

Both of them differ in their size. Float occupies 4 bytes however double occupies 8 bytes. This implies they also differ in the precision they provide. The precision of float is only six decimal digits, while double variables have a precision of about 15 digits. Hence it is safer to use double unless you are concerned about how much memory is being occupied.

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