Summary  
This chapter explains how to create a unique Symbol with an optional description via `Symbol(description)` and retrieve that description using the `.description` property.

General domain of usage  
Defining unique property keys in objects.

### Accessing the Description of the `Symbol()`

We can access the description of the symbol by calling the `.description` method.

let firstName = Symbol('Michael');
console.log(firstName.description);

### Summary

-   Symbol is a primitive data type that is used to create a unique identifier.
-   We use the global `Symbol()` function to create symbols.
-   We can provide a `description` to a `Symbol()` function as an optional argument.
-   The description of the symbol can be accessed through the `.description` property.

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The syntax of the JavaScript programming language is the set of rules that defines how a JavaScript program will be written and interpreted (by both the runtime system and by human readers).

JavaScript is dynamically typed (also called loosely typed) scripting language. That is, in javascript variables can receive different data types over time. Datatypes are basically typed of data that can be used and manipulated in a program.

Symbols 3/3

Accessing the Description of the `Symbol()`

解答

Summary

Symbols 3/3

Accessing the Description of the Symbol()

解答

Summary

Accessing the Description of the `Symbol()`