Object Oriented Programming in JavaScript Part – 2

Program 1

class Employee
{
          constructor(eid=101,ename="Ashok",salary=5000)  
          {
                console.log("This is constructor of class")
                this.eid=eid
                this.ename=ename
                this.salary=salary
          }
          showData()
          {
                  console.log("Employee id ",this.eid)
                  console.log("Employee name ",this.ename)
                  console.log("Employee salary ",this.salary)
          }
}

E1=new Employee(501,"Rajesh Sharma",90000)
E2=new Employee(502,"Amit Mishra",60000)
E3=new Employee()
E1.showData()
console.log("--------------------------------------")
E2.showData()
console.log("--------------------------------------")
E3.showData()

//                   console.log("Employee id ",E1.eid)
//                   console.log("Employee name ",E1.ename)
//                   console.log("Employee salary ",E1.salary)

// console.log("Employee id ",E2.eid)
// console.log("Employee name ",E2.ename)
// console.log("Employee salary ",E2.salary)

Program 2

class Myclass
{
         constructor(n)      
         {
            this.n=n
         }
         factorial()
         {
              let f=1
              while(this.n!=0)
              {
                f=f*this.n;
                this.n--
              }
              return f
         }
         evenodd()
         {
             if(this.n%2==0)
             console.log("Even Number ")
            else
            console.log("odd Number ")
         }
}

"use strict"
const ps=require("prompt-sync")
const prompt=ps({sigint:true})
let n=parseInt(prompt("Enter a number: "))

M1=new Myclass(n)
console.log("Factorial is: ",M1.factorial())
M1.evenodd()