Data Types in JavaScript

#atom

Content:
JavaScript is a dynamically typed language, meaning variables can hold values of any type without explicit type declaration. JavaScript data types are divided into two categories: primitive and non-primitive (reference) types.

Primitive Data Types:

number: Represents numeric values, including integers and floating-point numbers.
```
let age = 25;
let price = 99.99;
```
string: Represents textual data enclosed in single or double quotes.
```
let name = 'Alice';
```
boolean: Represents a logical value: true or false.
```
let isActive = true;
```
undefined: Represents a variable that has been declared but not assigned a value.
```
let x;
console.log(x); // undefined
```
null: Represents an intentional absence of any object value.
```
let y = null;
```
bigint: Represents integers larger than the number type can handle.
```
let bigNumber = 1234567890123456789012345678901234567890n;
```
symbol: Represents a unique and immutable value, often used as object property keys.
```
let id = Symbol('id');
```

Non-Primitive Data Types:

object: Represents a collection of key-value pairs. This includes arrays, functions, and objects.
```
let person = { name: 'Alice', age: 25 };
let colors = ['red', 'green', 'blue'];
```
function: Functions are objects that can be called to perform tasks.
```
function greet() {
    console.log('Hello!');
}
```

Type Checking:

Use the typeof operator to check the type of a value.

console.log(typeof 42); // "number"
console.log(typeof 'Hello'); // "string"
console.log(typeof {}); // "object"
console.log(typeof function() {}); // "function"

Connections:

Connections:

Sources:

From: Una breve guia a la programación y Javascript