title: Debug Levels when writing an application
body: <p>I would like to know if you guys have any suggestions about debug levels when writing an application.</p>
  
  <p>I thought about 4 levels:</p>
  
  <p>0 : No Debug<br>
  1 : All inputs and outputs<br>
  2 : "I am here" notification from significant functions with main parameters<br>
  3 : All variables verbose</p>