# Objects in JavaScript

JavaScript has special data structures called objects (in other programming languages they are called associative arrays or hashes).

Objects are created using braces `{ }`, inside which the elements of this object are written in the format key: value.

Let's create an empty object:

`let obj = {};`

And now let's create an object with data:

`let obj = {1: 'a', 2: 'b', 3: 'c'};`

Retrieve an element of the object by its key:

`console.log(obj[1]); // shows 'a'`

Create an object with keys from `1` to `7`, containing the names of the days of the week as values. Display all of its elements.

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