**Functions** are certain objects that receive values, perform operations and then return values.

The most significant advantage of a function is its ability to be used multiple times.

Look at the function example:

function meeting(name){
  console.log("------ Meeting with " + name + " ------");
  console.log("Hello, " + name + "!");
  console.log("I'm glad to see you!");
  console.log("But I need to go(");
  console.log("Good bye, " + name + "!");
  console.log("See you again!");
};

meeting("John");
meeting("Kate");
meeting("Stepan");

The `meeting` function is written on 8 lines and contains a block of code on 6 lines. You can see that it is called thrice and executes 18 in total 18 lines of code in total.

It can be called 100 times instead of repeating 600 lines via Copy+Paste.

> Note
>
> The above example is only for superficial acquaintance with the functions, it is not necessary to carefully analyze it.

First, let's get acquainted with JavaScript and look at its syntax. In this section, you will get a basic familiarity with the JavaScript syntax to make it easier to learn in detail later on.

Now it's time to learn about the data types that JavaScript works with. We'll start by looking at the difference between literals and variables, and then delve into the various data types.

We have become familiar with the various data types. Now, let's learn how to work with them by learning the operations we can perform with each data type.

Next, we will learn how to control the flow of execution. It's a straightforward process: we can tell the interpreter exactly what to do under certain conditions.

Next, we will explore how to shorten code using repetitive looped actions. We will examine the types of loops available in JavaScript and learn how to work with them.

Finally, to be able to write simple programs, we need to learn about functions that can make our lives much easier. We will learn how to create and use our functions.