Uses the newly created Service Function

Use-New-Service-Function.ts

import { Component, OnInit } from '@angular/core';
import { ExampleServiceService } from '../example-service.service';

@Component({
  selector: 'app-component-example',
  templateUrl: './component-example.component.html',
  styleUrls: ['./component-example.component.css']
})
export class ComponentExampleComponent implements OnInit {

  value: number = 0; 

  constructor(service:ExampleServiceService) {
    this.value = service.myTestFunction(1, 2, 3, 4);
  }

  ngOnInit() {
  }

}