title: How to pass values between activity
body: <p>I have created 3 activities: <code>firstActivity</code>, <code>secondActivity</code>, and <code>thirdActivity</code>. </p>
  
  <ol>
  <li><code>firstActivity</code> is the main activity.</li>
  <li><code>secondActivity</code> will work only if it receives an SMS, and it then sends the message to <code>thirdActivity</code>.</li>
  <li><code>thirdActivity</code> converts the string values to double values, and then sends the double values to <code>firstActivity</code>.</li>
  </ol>
  
  <p>I can send values from <code>secondActivity</code> to <code>thirdActivity</code>, but I don't know how to pass values ​​from <code>thirdActivity</code> to <code>firstActivity</code>. Please advise me on how I should do this.</p>