What are Primitive Data Types in JavaScript ?
Primitive data types are the built-in data types provided by all programming languages. Examples of primitive data types in JavaScript are string, number, boolean, null, symbol, and undefined. These data types can store only a single value of a particular type in the memory.
The primitive data types are explained below:
- String: It is a data type that stores the text values assigned using the double(” “) or single(‘ ‘) quotes.
- Number: The number data type represents a numerical value either a floating point or an integer.
- Boolean: It only contains the two values either true or false.
- null: It refers to a variable that stores only null as its value.
- Undefined: This data type means a variable that is declared but not yet initialized with a value.
- Symbol: It is introduced in ES6. It creates a private object property by referring to that key only.
Example: The below code practically implements all the primitive data types available in JavaScript.
Javascript
const str = "w3wiki" ; const num = 25; let undef; const nulled = null ; const workForce = Symbol(200); const obj = { name: "GFG" , desc: 'A Computer Science Portal.' , [workForce]: 200 } console.log( typeof str, typeof num, typeof undef, typeof nulled, typeof workForce ); console.log(obj[workForce]); |
Output
string number undefined object symbol 200
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