playing with oop js

script.js

class UserName {
  greet = 'Hello';
  constructor(name, age, birthYear, weight) {
    this.name = name;
    this.age = age;
    this.birthYear = birthYear;
    this.weight = weight;

    // calling methods here
    this._greetPeople();
    this.isHealthy();
  }

  _greetPeople() {
    return (`${this.greet} ${this.name} you are ${this.age} old`);
  }

  _calFutureAge(year) {
    this.futureAge = year - this.birthYear;
    console.log(`The future age will be ${this.futureAge}`);
  }

  isHealthy() {
    // this.fixAge = 100; -----> similar to const ageFix
    const ageFix = 100;
    if (this.age < ageFix) {
      console.log('You are healthy');
    } else {
      console.log('You are not healthy');
    }
  }

  
}

const abhishek = new UserName('Abhishek', 23, 1998, 56);
console.log(abhishek);
abhishek._calFutureAge(2040);