function Pen(name, color, price) {

    this.name = name;

    this.color = color;

    this.price = price;

}

​

const pen1 = new Pen("Marker", "Blue", "$3");

​

Pen.prototype.showPrice = function(){

    console.log(`Price of ${this.name} is ${this.price}`);

}

​

pen1.showPrice();

class Pen {

    constructor(name, color, price){

        this.name = name;

        this.color = color; 

        this.price = price;

    }

    showPrice(){

        console.log(`Price of ${this.name} is ${this.price}`);

    }

}

​

const pen1 = new Pen("Marker", "Blue", "$3");

pen1.showPrice();