In the previous chapters, we printed some expressions. However, what to do if we need to store these expressions for future usage? In C++ (like in other programming languages) there are containers to keep data - **variables**.  For each type of data (numbers, strings, characters) there is a type of variable. 

Let’s take a look at the most often used types:

Why do we need to know the type of each variable? In Python, for example, you can store the data without worrying about its type. 

When you declare variables in C++, the type of variable is a mandatory parameter, so knowing and correctly using data types will help to avoid many mistakes. 

Let's look at an example of a variable declaration:

You can also reassign your variable if it’s needed:

double num = 3.2;
num = 12.44;
cout << num;

You might also declare a variable but assign the value later or define the multiple variables of the same type in one declaration:

Learn basics of C++ and write your first code!

In this section, you will learn the most important things about variables manipulations.

In this section, you will learn how booleans can help in creating programs behaving differently depending on some conditions.

In this section, you will learn how to write different loops in C++ to manipulate your data!

In this section, you will learn how the array works and how to apply loops to iterate through the array.

Types of Variables

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Types of Variables

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