title: How to print absolute time in TCL and relative time in TCL?
body: <p>How to print absolute time in TCL? </p>
  
  <p>The output would be something like <code>2018-03-07-14:32:09.040+05:30I-----</code></p>
  
  <p>I want to create a logic to print epoch microseconds. but I cannot use in build <code>clock milliseconds</code> to print the epoch microseconds.</p>