title: What is the decimal part in timestamp?
body: <p>I run the following code in python,</p>
  
  <pre><code>import time
  print(time.time())
  </code></pre>
  
  <p>and the output was:</p>
  
  <p><code>1557990717.6383634</code></p>
  
  <p>Can someone explain the two parts to the left and right of the decimal point. Why's there a decimal point?</p>