wp-ngDoCheck-01.ts

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

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  public numbers: number[] = [5, 69, 9];

  public add(): void {
    const random: number = Math.floor(Math.random() * 100);

    this.numbers.push(random);
  }

  public edit(): void {
    const random: number = Math.floor(Math.random() * 100);

    this.numbers[0] = random;
  }
}