<p>Hi everyone, My name is Arinze Calistus. The purpose of this blog is to teach you all you need to know about JavaScript.</p>
<h2 id="heading-javascript-is-dynamic">Javascript is Dynamic</h2>
<p>It may interest you to know that JS is a dynamic language. Variables are not directly associated with a single data type, unlike in other programming languages. Any variable in JS can be reassigned to values of all types.</p>
<h3 id="heading-for-example">For Example</h3>
<pre><code class="lang-plaintext">var x = " text "; // x is a string
x = true; // x is now a boolean
x = 24;  // x is now a number
document.write(x);
</code></pre>
<h2 id="heading-the-typeof-operator">The <code>typeOf</code> Operator</h2>
<p>The <code>typeof</code> returns a string indicating the data type of the evaluated operand.</p>
<pre><code class="lang-plaintext">typeOf "Her name is Rachell."; // returns "string"
typeOf 34; // returns "number"
typeOf true; // returns "boolean"
typeOf undefined; // returns "undefined"
</code></pre>
<h2 id="heading-primitive-data">Primitive Data</h2>
<p>Primitive data are data that are not object and has no methods. There are 4 basic primitive data types:</p>
<ul>
<li><p>string</p>
</li>
<li><p>number</p>
</li>
<li><p>boolean</p>
</li>
<li><p>undefined</p>
</li>
</ul>
<p>All these primitive data types can be returned by the <code>typeOf</code> operator. Just like in the previous example.</p>
<p>Thanks for reading!!</p>


Hi everyone, My name is Arinze Calistus. The purpose of this blog is to teach you all you need to know about JavaScript.

## Javascript is Dynamic

It may interest you to know that JS is a dynamic language. Variables are not directly associated with a single data type, unlike in other programming languages. Any variable in JS can be reassigned to values of all types.

### For Example

```plaintext
var x = " text "; // x is a string
x = true; // x is now a boolean
x = 24;  // x is now a number
document.write(x);
```

## The `typeOf` Operator

The `typeof` returns a string indicating the data type of the evaluated operand.

```plaintext
typeOf "Her name is Rachell."; // returns "string"
typeOf 34; // returns "number"
typeOf true; // returns "boolean"
typeOf undefined; // returns "undefined"
```

## Primitive Data

Primitive data are data that are not object and has no methods. There are 4 basic primitive data types:

* string
    
* number
    
* boolean
    
* undefined
    

All these primitive data types can be returned by the `typeOf` operator. Just like in the previous example.

Thanks for reading!!

Chapter 9 with Examples

Javascript 9

Javascript is Dynamic

For Example

The typeOf Operator

Primitive Data

Hi everyone, My name is Arinze Calistus and I'm a self-taught Full-Stack developer that learned and is still learning through online resources. I would love to connect with people and have a chat.
