Question

statement is used to accept value to the variable given by the user.
are the kind of key value pairs.​

Answer 1

Explanation:

$\begin{tabular}{ccc} </p><p>\hline </p><p>Col. 1 & Col. 2 & Col. 3\\ </p><p>\hline </p><p>11 & 12 & 13 \\ </p><p>\hline </p><p>21 & 22 & 23 \\ </p><p>\hline </p><p>31 & 32 & 33 \\ </p><p>\hline </p><p>\end{tabular}$

Answer 2

$\huge{\boxed{\mathfrak{Answer}}}$

As we know from the chapter Data types, there are eight data types in JavaScript. Seven of them are called “primitive”, because their values contain only a single thing (be it a string or a number or whatever).

In contrast, objects are used to store keyed collections of various data and more complex entities. In JavaScript, objects penetrate almost every aspect of the language. So we must understand them first before going in-depth anywhere else.

An object can be created with figure brackets {…} with an optional list of properties. A property is a “key: value” pair, where key is a string (also called a “property name”), and value can be anything.

We can imagine an object as a cabinet with signed files. Every piece of data is stored in its file by the key. It’s easy to find a file by its name or add/remove a file.

A property has a key (also known as “name” or “identifier”) before the colon ":" and a value to the right of it.

In the user object, there are two properties:

The first property has the name "name" and the value "John".

The second one has the name "age" and the value 30.

The resulting user object can be imagined as a cabinet with two signed files labeled “name” and “age”.