#30: Abstract Classes in TypeScript in Hindi 👉 with Real-life Examples

[@ThapaTechnical]

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[@editor999official]

12:21 Line 53 mein aapko
color.displayArea; //aese nhi likhna hai
color.displayArea(); //aese likhna hai,
warna line 46 main displayArea wala function waste hojaega.
Btw you are the best teacher, Thankyou so much to teach us for free

[@nityaranjan6714]

Why we write circle.displayArea ? displayArea is a function, so it should be writen as circle.displayArea() right?

[@vivekbhardwaj3964]

Great session

[@VivekYadav-up7uu]

can you make a playlist on react native

[@Radhe_radhe2929]

😊😊

[@AkashKumar-kg7ge]

❤

[@saurabhkamble3211]

Area of Rectangle and Square using Getter and Setter Method
//Area of Square
class ArSq{
private _side:number | undefined;
constructor(
public name: string,
public color:string,
)
{
}
public set side(side:number){
if(side < 0){
throw new Error("Invalid Input")
}
this._side=side;
}
public get side(){
if(this._side==undefined){
throw new Error("It is undefoned")
}
return this._side ** 2;
}
info():string{
return ``
}
}
// Area of Rectangle
class Rectangle {
private length: number;
private width: number;
constructor(length: number, width: number) {
this.length = length;
this.width = width;
}
// getter method for length
get Length(): number {
return this.length;
}
// setter method for length
set Length(value: number) {
if (value < 0) {
throw new Error("Length cannot be negative.");
}
this.length = value;
}
// getter method for width
get Width(): number {
return this.width;
}
// setter method for width
set Width(value: number) {
if (value < 0) {
throw new Error("Width cannot be negative.");
}
this.width = value;
}
// method to calculate area
calculateArea(): number {
return this.length * this.width;
}
}
class squ1 extends ArSq{
}
const rectangle = new Rectangle(10,50);
const Ars:ArSq = new squ1("Square","Red")
console.log(`Area of rectangle: ${rectangle.calculateArea()}`);
// change the length and width
rectangle.Length = 20;
rectangle.Width = 10;
console.log(`Area of rectangle after changing length and width: ${rectangle.calculateArea()}`);
Ars.side = 50;
console.log("The Area of Square: ",Ars.side)