Each variable has its **address** in memory, a storage unit where it "lives" during the program's execution. To access the address, you can use **ampersand** `&`. For instance:

It means that the address of the variable `x` for this execution of your code is **0x7ffd586e0344**. With each execution, the address can change since the program can start at any part of your memory.

A **pointer** is a variable that **stores the address** of another variable. To declare the pointer use the **asterisk** `*`. For example, let's declare a pointer to the variable type of `double`:

Like with variables, we have to name the pointer and define the type it points to by declaration.

Let's learn how to assign the address of the variable to a pointer. For example, we want to know where the variable `b` is. Let's write down its address to the pointer `pb`:

To assign to the pointer the variable address, use the pointer's name without `*`. Or you can define the pointer by the declaration:

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In this section, you will repeat datatypes and arrays, discovering the memory behind them.

Here you will learn what pointers and references are, where they can be used, and the difference between them.

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Pointers

Output the address of the variable x.