C++ Tutorial: Variables

Syntax

To declare a variable in C++, use the following syntax:

data_type variable_name;

Example

#include <iostream>

int main() {
  int my_variable = 10;
  std::cout << "Value of my_variable is " << my_variable << std::endl;
  return 0;
}

Output

Value of my_variable is 10

Explanation

Variables in C++ are used to store values of various data types, including int, float, char, bool, and more. In the example above, we declared a variable my_variable of type int and assigned it a value of 10. We then printed the value of my_variable to the console using std::cout.

Use

Variables are used in C++ to store data that can be manipulated and used throughout the program. They can be used in calculations, comparisons, and assignments.

Important Points

• Variables must be declared with a data type before they can be used.
• Variables can be initialized with a value when they are declared.
• The value stored in a variable can be changed throughout the program.
• Variables can be used in calculations, comparisons, and assignments.

Summary

In this tutorial, we learned how to declare and use variables C++. We learned about the syntax for declaring variables, initializing variables with values, and printing the value of variables to the console. We also learned about the importance of variables in storing data that can be manipulated and used throughout our programs.