Data types - JavaScript Tutorial - w3Schools - Chapter-12 English

Описание: JavaScript variables can hold different data types: numbers, strings, objects and more.
In programming, data types is an important concept.

To be able to operate on variables, it is important to know something about the type.

Without data types, a computer cannot safely solve expressions.

JavaScript evaluates expressions from left to right. Different sequences can produce different results.

JavaScript has dynamic types. This means that the same variable can be used to hold different data types.