<div>
What data are you passing to the function?<br />
How are you calling it?
</div>


What data are you passing to the function?
How are you calling it?

<div>
What do you get with ?<br />
could you give the values you get in the alert?<br />

<pre><code id="code-20-42557426-1">distance(lat1, lon1, lat2, lon2) {
     alert(lat1 + &quot; / &quot; + lon1 + &quot; / &quot; + lat2 + &quot; / &quot; + lon2 );
     return 12.34;  
  }</code></pre>
</div>


What do you get with ?
could you give the values you get in the alert?


distance(lat1, lon1, lat2, lon2) {
     alert(lat1 + " / " + lon1 + " / " + lat2 + " / " + lon2 );
     return 12.34;  
  }

<div>
<div class="content wysiwyg-content">
im getting NaN result !! <br />
<br />
<br />

<pre><code id="code-10-29098547-1">distance(lat1, lon1, lat2, lon2) {
  this.R =  6371; // RadparseIntius of the earth in km
  this.dLat = this.deg2rad(lat2 - lat1); // deg2rad below
  this.dLon = this.deg2rad(lon2 - lon1);
    var a =
      Math.sin(this.dLat / 2) * Math.sin(this.dLat / 2) +
      Math.cos(this.deg2rad(lat1)) * Math.cos(this.deg2rad(lat2)) *
      Math.sin(this.dLon / 2) * Math.sin(this.dLon / 2);
  
  this.c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
  this.d =   this.R * this.c; // Distance in km
  
    return this.d;
  
  }</code></pre>
</div>
</div>


nan value

JavaScript is a dynamic, object-based language commonly used for client-side scripting in web browsers. Recently, server side JavaScript frameworks have also emerged. JavaScript runs on nearly every operating system and  in almost every mainstream web browser.

JavaScript

Angular is a JavaScript open-source web application framework used to develop single-page applications. It aims to simplify both the development and the testing of such applications by providing a framework for client-side model–view–controller (MVC) and model–view–view-model (MVVM) architectures, along with components commonly used in rich Internet applications. Angular is the front-end part of the MEAN stack, together with Node.js runtime, Express.js backend framework and MongoDB database.