how to use a service in angular code example

Example 1: angular create a service

>>> ng generate service service_name
or
>>> ng generate service /folder-name/service-name

Example 2: services in angular

ng g service service_name

Example 3: how to inject service in component angular 6

you can inject service in components constructor:
constructor(public anyService: Service){}

Example 4: angular import service

import { Service } from '../';