title: Exiting a program from an If/ELSE statement with Python
body: <p>I am attempting to exit a program without using sys.exit()
  The user is asked whether they wish to continue and if they input "Yes" a message saying so is printed and the program continues to run.  If they input anything else a message saying they chose to exit is printed and then the program is meant to exit.</p>
  
  <pre><code>def keep_going():
  
      answer = raw_input("Do you wish to continue?")
  
      if answer == "yes":
          print "You have chosen to continue on"
      else:
          print "You have chosen to quit this program"
  </code></pre>
  
  <p>What I am struggling with is what to add to ELSE to return something to my main which will cause the program to exit and how to go about writing that in code.</p>