ng-providers.app-cmp-call1.ts

import { Component } from '@angular/core';
import { ApiService } from './api.service';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css'],
})
export class AppComponent {
  title = 'app';

  constructor(private apiService: ApiService) {
    apiService.serviceCall();
  }
}