What data types are considered simple?

In Node.js (as in JavaScript), primitive data types include:

• String: Text data.
• Number: Numbers (integers and floating-point).
• BigInt: Arbitrarily large integers.
• Boolean: Logical values (true or false).
• Undefined: The value assigned to a variable that has not been initialized.
• Symbol: A unique and immutable primitive value, often used as property keys of objects.
• null: A special value indicating the deliberate absence of any object value.