# Null vs Undefined in JavaScript

Do you really know the difference between "null" and "undefined" in JavaScript? If not, let me explain.

## **Undefined**
In JavaScript, undefined means a variable has been declared but has not yet been assigned a value. For example:

``` X is like a new team member in your company who hasn't been assigned any role yet. ```

```
let X;

console.log(X) 
undefined

console.log(typeof X)
undefined
```

## **Null**
 Null is an assignment value. It can be intentionally assigned to a variable as a representation of no value: For example:

```X is like a team member in your company who has been intentionally told to do nothing as of now.```

```
let X = null;

console.log(X) 
null

console.log(typeof X) 
object
```

```typeof(null) will interestingly return 'object'. Unfortunately, this can be considered a bug in JS where the datatype of null is an object.]```

> Also, note that ```undefined == null``` will return ```true```, meanwhile ```undefined === null``` will return ```false```. It means null is equal to undefined but not identical(because they have different datatypes).

Happy coding :)

#10daysofJSfundamentals (Day 2)