Ẓeṛ aɣbalu n JavaScript

== 4. Tawsit n Isefka ==
JavaScript tesɛa sin n wudmawen n tewsit n isefka:

=== 4.1. Tiwsitin tizwaranin ===
{| class="wikitable"
|+
!Tawsit
!Amedya
!Aglam
|-
|number
|42, 3.14
|Amḍan ummid neɣ amḍan s ticcert
|-
|string
|"Azul"
|Azrar n isekkilen
|-
|boolean
|true, false
|Ilem neɣ ulac
|-
|undefined
|undefined
|Amutti ur yettusbedden
|-
|null
|null
|Ulac s umata
|-
|symbol
|Symbol('id')
|Azamal asuf (ES6)
|-
|bigint
|9007199254740991n
|Amḍan ameqqran aṭas (ES2020)
|}

=== 4.2. Tawsit n tɣawsa ===
Yal ayen ur nelli ara d tiwsit tizwaranen d taɣawsa. Deg-s:

* Array (Tafelwit): let arr = [1, 2, 3];
* Object (Taɣawsa): let obj = {isem: "Samir", leɛmer: 25};
* Function (Tasɣent): function azur() { return "Azul!"; }

=== 4.3. Aselkem n tewsit (typeof) ===
<syntaxhighlight lang="javascript">
typeof 42;           // "number"
typeof "Azul";       // "string"
typeof true;         // "boolean"
typeof undefined;    // "undefined"
typeof null;         // "object" (tuccḍa deg umezruy)
typeof {};           // "object"
typeof [];           // "object"
typeof function(){}; // "function"
</syntaxhighlight>