import { Component } from '@angular/core';
import { User } from './user';
@Component({
  selector: 'my-app',
  templateUrl: './app.component.html',
  styleUrls: [ './app.component.css' ]
})
export class AppComponent  {
  
  constructor() {
    
    const obj = {
      firstName: 'Paresh',
      lastName: 'Gami',
      phoneNumber: 9726502930
    };

    // const objNew: User = {
    //   firstName: 'Paresh',
    //   lastName: 'Gami'
    // };

    // HERE Try to passing only 2 argument typescript gives you error instantly

    this.setUser(obj)
  }

  setUser(obj: User) {
    console.log(obj);
  }
}