Chapter 11, Problem 1RQE

Explanation of Solution

Primitive data type:

Primitive data types are pre-defined data types, which can be used directly by the programmers to declare the variables.

Some of the primitive data types available in C++ programming language are as follows:

Integer:

• Integer is one of the predefined data types. The keyword used for declaring integer data type is “int”.
• It takes up to 4 bytes of memory space to store data. It ranges from -147483648 to 2147483647.
• Example for declaring integer data type is as follows:
  • int variable1 = 10;

Floating point:

• Floating point is a predefined data type. The keyword used for declaring floating point is “float”.
• It takes up to 4 bytes of memory space to store data. It ranges from +/- 3.4e +/- 38.
• Example for declaring floating point data type is as follows:
  • float variable1 = 10.3;

Character:

• Character is a predefined data type. The keyword used for declaring character data type is “char”.
• It takes 1 byte of memory space to store data. It ranges from -127 to 127 or 0 to 255
• Example for declaring character data type is as follows:
  • char variable1 = 'a';

Boolean:

• Boolean is a predefined data type. The keyword used for declaring Boolean data type is “bool”. It stores data in the form of “true” or “false”.
• Example for declaring Boolean data type is as follows:
  • bool variable1 = true;

Double Floating point:

• Double Floating point is a predefined data type. The keyword used for declaring double is “double”.
• It takes up to 8 bytes of memory space to store data. It ranges from +/- 1.7e +/- 308
• Example for declaring double data type is as follows:
  • double variable1 = 11.34;

Void:

• Void represents null value. The keyword used for void is “void”.

Wide Character:

• Wide Character is a predefined data type. The keyword used for declaring  wide character is “wchar_t”.

Example:

The below program demonstrates the usage of primitive data type “integer”:

//Include the header files

#include<iostream>

using namespace std;

//Main function

int main()

{

//Variable declaration

int i, n = 5;

//for loop to print 1 to 5

for (i = 1; i <= n; i++)

{

//print the value of “i”

cout << i << "\n";

}

//Print a new line

cout << "\n";

//Return the value 0

return 0;

}

Sample Output

1

2

3

4

5