TypeScript Features

Static Typing:

It allows specifying data types for parameters and properties

let name: string

let age: number

Typescript Interfaces: 

interface ICat{

    name:string  //Required Property in derived objects

    age?:number //Optional Property

}

Objects implementing this interface should use properties of the same type

let fluffy: ICat

fluffy  = { name: 'Fluffy'}

Typescript Class Properties:

class Student

 {

private name: string

speak()

constructor(name)

{

}

}

Public-Private properties

In typescript, properties can be public/private. See above example. Below example also correct concerning class properties

class Student

{

    constructor(private name)

{

    

}

}