JavaScript – Primitive Datatypes
Primitive Datatypes are those which are represented directly at the lowest level of language implementation. There are six primitive datatypes in JavaScript. They are :
- string
- number
- boolean
- null
- undefined
- symbol
Primitive data types does not have any methods.
JavaScript provides wrapper objects for the primitive datatypes with methods implemented.
| Primitive Datatype | Wrapper Object |
| string | String |
| number | Number |
| boolean | Boolean |
| symbol | Symbol |
For the primitive datatypes : null, undefined : there are no Wrapper Objects.
Initialize variables with primitive values
JavaScript is a dynamic language.
- Variables are not declared with a datatype.
- A variable is not fixed to a single datatype.
- A variable’s datatype changes with the value assigned to a variable.
- To know a datatype of value that is stored in a variable, usetypeof variableName .
Note: Null datatype has only one value and that is null. In JavaScript a null value represents a reference that points, generally intentionally, to a nonexistent or invalid object or address.
Conclusion
In this JavaScript Tutorial – Primitive Datatypes, we have learnt about the different datatypes available, how to initialize a variable with one of them, and how to know a variable’s value datatype.