title: How to send a parameter (id) with get http request?
body: <p>I started typing and http.get accepts only url so i don't have any idea how to 
  send and id of a person to get that person from my api which gets it from Sql database .</p>
  
  <pre><code>public getByID(n :number) : Promise&lt;any&gt;{
  
      return this.http.get(this.url).toPromise();
    }
  </code></pre>
  
  <p>maybe appending it to an url ?</p>