<input type="text" [(ngModel)]="name">

{{name}}

import { Component, OnInit } from '@angular/core';

@Component({

  selector: 'app-bind',

  templateUrl: './bind.component.html',

  styleUrls: ['./bind.component.css']

})

export class BindComponent implements OnInit {

  private name;

  constructor() { }

  ngOnInit() {

    this.name = 'cys';

  }

}