Variables & Data Types in TypeScript

array

object

list

array[]

boolean

string

integer

any

string

char

text

character

Object

Array

Set

Map

null

undefined

void

any

It represents an object that never changes.

It represents a value that never exists.

It represents a function that always throws an error or never finishes.

It represents a type with a specific default value.

Object

interface

type

array

let value: string | number;

let value: string & number;

let value: any;

let value: union<string, number>;

null

undefined

any

object

It is a type that can hold any value, similar to any, but requires type checking before performing operations on it.

It represents a value that is always undefined.

It represents a variable whose value can never be determined.

It is the same as any but allows no type inference.