Primitive - (String, Symbol (contain unique prop to avoid name clashes), Number, null, undefined, Boolean, BigInt) (SNNUB acronym) – Primitive is immutable (means you cannot modify anything in existing values, you can only replace it) data type. They are passByValue, meaning modifications to a copy do not affect the original value. When comparing <code>a == b</code>, it returns true if the values are equal. Primitive values are stored in the stack because they are fixed in size and faster to access. PS: typeof null returns is Object
Non Primitive – Object, Array, functions called as non-primitive type. – Non-primitive is mutable (means you can modify existing values) data type. It is passByReference so modifying a copied value also modifies the original array/object. Non-primitive values are stored in the heap because they can be dynamic in size and require more complex memory management.
<pre><code class="lang-javascript">let obj = { name: "Alice" };
let copy = obj;
copy.name = "Bob";
console.log(obj.name); // Outputs: Bob
</code></pre>

**Primitive** - (String, Symbol *(contain unique prop to avoid name clashes)*, Number, null, undefined, Boolean, BigInt) (**SNNUB** acronym) – Primitive is **immutable** *(means you cannot modify anything in existing values, you can only replace it)* data type.  
They are **passByValue**, meaning modifications to a copy do not affect the original value. When comparing `a == b`, it returns true if the values are equal. Primitive values are stored in the stack because they are fixed in size and faster to access.  
**PS:** **typeof null** returns is Object

**Non Primitive** – Object, Array, functions called as non-primitive type. – Non-primitive is **mutable** *(means you can modify existing values) data type*. It is **passByReference** so modifying a copied value also modifies the original array/object. Non-primitive values are stored in the heap because they can be dynamic in size and require more complex memory management.

```javascript
let obj = { name: "Alice" };
let copy = obj;
copy.name = "Bob";
console.log(obj.name); // Outputs: Bob
```

Understanding the Difference: Primitive vs Non-Primitive Data Types in JavaScript

Understanding the Difference: Primitive vs Non-Primitive Data Types in

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