What are the data types in TypeScript? (code example)

Whenever a variable is created, the intention is to assign some value to the variable, but what type of value can be assigned to the variable depends on the data type of the variable. In typeScript, type System represents the different types of data types supported by typeScript. Data types are classified as follows:

Built-in data types: TypeScript has some predefined data types-

Built-in data type	Keyword	Description
Number	Number	It is used to represent integers and floating point numbers
Boolean	Boolean	Represents true and false
String	String	It is used to represent a sequence of characters
Void	Void	Usually used for function return types
Null	Null	Use it when the object does not have any value
Undefined	Undefined	Indicates the value of an uninitialized variable
Any	Any	If you declare a variable using the Any data type, you can assign any type of value to the variable

Example:

let a: null = null;
let b: number = 123;

let c: number = 123.456;
let d: string = ‘Geeks’;
let e: undefined = undefined;
let f: boolean = true;
let g: number = 0b111001; // 二进制
let h: number = 0o436; // 八进制
let i: number = 0xadf0d; // Hexa-Decimal

User-defined data types: In addition to built-in data types, users can also customize data types. User-defined types include enums, classes, interfaces, arrays, and tuples.

Note: Among the built-in data types, any is a special data type and the super data type of all data types. If we declare a variable with any data type, then we can assign any type value to the variable.

Example:

let a: any = null;
let b: any =123;
let c: any = 123.456;
let d: any = ‘Geeks’;
let e: any = undefined;
let f: any = true;

Related recommendations: "typescript document tutorial"

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