JavaScript has dynamic typing, meaning that data types are determined automatically during program execution. Here are some of the main data types in JavaScript:
Primitive Types:String: Used to represent textual information. Example: "Hello, World!".Number: Used to represent numeric values, either integer or floating-point. Example: 42 or 3.14.Boolean: Represents true or false values.Null: Represents the absence of a value or absence of an object.Undefined: Indicates that a value has not been assigned.
String: Used to represent textual information. Example: "Hello, World!".
Number: Used to represent numeric values, either integer or floating-point. Example: 42 or 3.14.
Boolean: Represents true or false values.
Null: Represents the absence of a value or absence of an object.
Undefined: Indicates that a value has not been assigned.
Object Types:Object: Used to represent complex data and structures. Objects in JS can have properties and methods. Example:javascriptCopy codelet person = {
name: "John",
age: 30,
isStudent: false
};
Array: Used for an ordered list of values. Arrays in JS are indexed starting from 0. Example:javascriptCopy codelet numbers = [1, 2, 3, 4, 5];
Function: Functions in JS are objects and can be assigned to variables, passed as arguments, and returned from other functions. Example:javascriptCopy codefunction add(a, b) {
return a + b;
}
Object: Used to represent complex data and structures. Objects in JS can have properties and methods. Example:javascriptCopy codelet person = {
name: "John",
age: 30,
isStudent: false
};
Array: Used for an ordered list of values. Arrays in JS are indexed starting from 0. Example:javascriptCopy codelet numbers = [1, 2, 3, 4, 5];
Function: Functions in JS are objects and can be assigned to variables, passed as arguments, and returned from other functions. Example:javascriptCopy codefunction add(a, b) {
return a + b;
}
Special Types:Symbol: Introduced in ECMAScript 6, it is an immutable primitive that can be used as an identifier for object properties.BigInt: Introduced in ECMAScript 2020, this is a special type for representing arbitrarily large integers.
Symbol: Introduced in ECMAScript 6, it is an immutable primitive that can be used as an identifier for object properties.
BigInt: Introduced in ECMAScript 2020, this is a special type for representing arbitrarily large integers.
These types interact and complement each other during the execution of JavaScript programs.
