java script data type.

One of the most fundamental characteristics of a programming language is the set of data types it supports. These are the type of values that can be represented and manipulated in a programming language.

JavaScript allows you to work with three primitive data types:

•  Numbers, e.g., 123, 120.50 etc
•  Strings of text, e.g. "This text string" etc.
•  Boolean, e.g. true or false.

JavaScript also defines two trivial data types, null and undefined, each of which defines only a single value. In addition to these primitive data types, JavaScript supports a composite data type known as object. We will cover objects in detail in a separate chapter. 

Note: Java does not make a distinction between integer values and floating-point values. All numbers in JavaScript are represented as floating-point values.