What are the primitive data types in JavaScript?

What are the primitive data types in JavaScript?

In JavaScript, there are six primitive data types: Undefined, Null, Boolean, Number, String, and Symbol.

Can you explain each of them briefly?

Sure!

1. Undefined: A variable that has been declared but not assigned a value.
2. Null: A variable that intentionally has no value.
3. Boolean: Represents a logical entity and can have two values: true or false.
4. Number: Represents both integer and floating-point numbers.
5. String: Represents a sequence of characters.
6. Symbol: A unique and immutable value often used as object property keys.

What is the difference between null and undefined?

Null is an intentional absence of any value, while undefined means a variable has been declared but not assigned a value.

How do I check the type of a variable?

You can use the typeof operator. For example, typeof variableName will return the type of the variable.